12-Letter Words Starting With I
Here's the list of all the 1197 12-Letter Words Starting With I in the English Language.
The list is arranged by the word lengths. Click on the length below to jump to the relevant section of the page.
| Common Words (with Definitions and Examples) | |
|---|---|
| introduction | 1. the act of beginning something new 2. the first section of a communication More Definitions → |
| instructions | 1. a manual usually accompanying a technical device and explaining how to install or operate it More Definitions → |
| installation | 1. the act of installing something (as equipment) 2. a building or place that provides a particular service or is used for a particular industry More Definitions → |
| intelligence | 1. the ability to comprehend; to understand and profit from experience 2. a unit responsible for gathering and interpreting information about an enemy More Definitions → |
| intellectual | 1. a person who uses the mind creatively 2. appealing to or using the intellect More Definitions → |
| incorporated | 1. formed or united into a whole 2. organized and maintained as a legal corporation More Definitions → |
| independence | 1. freedom from control or influence of another or others 2. the successful ending of the American Revolution More Definitions → |
| intermediate | 1. act between parties with a view to reconciling differences 2. lying between two extremes in time or space or state More Definitions → |
| increasingly | 1. advancing in amount or intensity More Definitions → |
| intervention | 1. the act of intervening (as to mediate a dispute, etc.) 2. a policy of intervening in the affairs of other countries More Definitions → |
| illustration | 1. artwork that helps make something clear or attractive 2. showing by example More Definitions → |
| individually | 1. apart from others More Definitions → |
| investigator | 1. a scientist who devotes himself to doing research 2. someone who investigates More Definitions → |
| instrumental | 1. relating to or designed for or performed on musical instruments 2. serving or acting as a means or aid More Definitions → |
| intersection | 1. a point where lines intersect 2. a junction where one street or road crosses another More Definitions → |
| interference | 1. a policy of intervening in the affairs of other countries 2. the act of hindering or obstructing or impeding More Definitions → |
| introductory | 1. serving to open or begin 2. serving as a base or starting point More Definitions → |
| infringement | 1. an act that disregards an agreement or a right 2. a crime less serious than a felony More Definitions → |
| insufficient | 1. of a quantity not able to fulfill a need or requirement More Definitions → |
| inconsistent | 1. not capable of being made consistent or harmonious 2. not in agreement More Definitions → |
| inflammatory | 1. characterized or caused by inflammation 2. arousing to action or rebellion More Definitions → |
| interpreting | 1. an explanation of something that is not immediately obvious More Definitions → |
| inflammation | 1. a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat 2. the state of being emotionally aroused and worked up More Definitions → |
| imprisonment | 1. putting someone in prison or in jail as lawful punishment 2. the state of being imprisoned More Definitions → |
| identifiable | 1. capable of being identified More Definitions → |
| invitational | 1. pertaining to or characteristic of an invitation More Definitions → |
| immunization | 1. the act of making immune (especially by inoculation) More Definitions → |
| illumination | 1. a condition of spiritual awareness; divine illumination 2. the degree of visibility of your environment More Definitions → |
| incompatible | 1. not compatible 2. used especially of drugs or muscles that counteract or neutralize each other's effect More Definitions → |
| interruption | 1. an act of delaying or interrupting the continuity 2. some abrupt occurrence that interrupts an ongoing activity More Definitions → |
| intermittent | 1. stopping and starting at irregular intervals More Definitions → |
| interconnect | 1. be interwoven or interconnected 2. cause to be interconnected or interwoven More Definitions → |
| irrespective | 1. in spite of everything; without regard to drawbacks More Definitions → |
| indefinitely | 1. to an indefinite extent; for an indefinite time More Definitions → |
| incidentally | 1. introducing a different topic 2. of a minor or subordinate nature More Definitions → |
| incontinence | 1. involuntary urination or defecation 2. indiscipline with regard to sensuous pleasures More Definitions → |
| interpretive | 1. that provides interpretation More Definitions → |
| intermediary | 1. a negotiator who acts as a link between parties More Definitions → |
| illustrative | 1. clarifying by use of examples 2. serving to demonstrate More Definitions → |
| infiltration | 1. a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection) 2. the slow passage of a liquid through a filtering medium More Definitions → |
| irresistible | 1. impossible to resist; overpowering 2. overpoweringly attractive More Definitions → |
| intimidation | 1. the act of intimidating a weaker person to make them do something 2. the feeling of discouragement in the face of someone's superior fame or wealth or status etc. More Definitions → |
| interception | 1. the act of intercepting; preventing something from proceeding or arriving 2. (American football) the act of catching a football by a player on the opposing team More Definitions → |
| indebtedness | 1. an obligation to pay money to another party 2. a personal relation in which one is indebted for a service or favor More Definitions → |
| indifference | 1. unbiased impartial unconcern 2. apathy demonstrated by an absence of emotional reactions More Definitions → |
| inaccessible | 1. capable of being reached only with great difficulty or not at all 2. not capable of being obtained More Definitions → |
| inauguration | 1. the act of starting a new operation or practice 2. the ceremonial induction into a position More Definitions → |
| irreversible | 1. incapable of being reversed More Definitions → |
| illuminating | 1. tending to increase knowledge or dissipate ignorance More Definitions → |
| implantation | 1. (embryology) the organic process whereby a fertilized egg becomes implanted in the lining of the uterus of placental mammals 2. the act of planting or setting in the ground More Definitions → |
| intimidating | 1. discouraging through fear More Definitions → |
| incompetence | 1. lack of physical or intellectual ability or qualifications 2. inability of a part or organ to function properly More Definitions → |
| impoverished | 1. poor enough to need help from others 2. destroyed financially More Definitions → |
| interstellar | 1. between or among stars More Definitions → |
| incandescent | 1. emitting light as a result of being heated 2. characterized by ardent emotion or intensity or brilliance More Definitions → |
| interstitial | 1. of or relating to interstices More Definitions → |
| inactivation | 1. the process of rendering inactive 2. breaking up a military unit (by transfers or discharges) More Definitions → |
| inconvenient | 1. not conveniently timed 2. not suited to your comfort, purpose or needs More Definitions → |
| invertebrate | 1. any animal lacking a backbone or notochord; the term is not used as a scientific classification 2. lacking a backbone or spinal column More Definitions → |
| intoxication | 1. the physiological state produced by a poison or other toxic substance 2. a temporary state resulting from excessive consumption of alcohol More Definitions → |
| interlocking | 1. contact by fitting together 2. the act of interlocking or meshing More Definitions → |
| intermission | 1. the act of suspending activity temporarily 2. a time interval during which there is a temporary cessation of something More Definitions → |
| illegitimate | 1. the illegitimate offspring of unmarried parents 2. contrary to or forbidden by law More Definitions → |
| incineration | 1. the act of burning something completely; reducing it to ashes More Definitions → |
| interrelated | 1. reciprocally connected More Definitions → |
| infrequently | 1. not many times More Definitions → |
| inspectorate | 1. a body of inspectors More Definitions → |
| inflationary | 1. associated with or tending to cause increases in inflation More Definitions → |
| inefficiency | 1. unskillfulness resulting from a lack of efficiency More Definitions → |
| intracranial | 1. within the skull More Definitions → |
| incomparable | 1. such that comparison is impossible; unsuitable for comparison or lacking features that can be compared More Definitions → |
| irritability | 1. an irritable petulant feeling 2. excessive sensitivity of an organ or body part More Definitions → |
| immunisation | 1. the act of making immune (especially by inoculation) More Definitions → |
| insurrection | 1. organized opposition to authority; a conflict in which one faction tries to wrest control from another More Definitions → |
| intoxicating | 1. causing intoxication 2. extremely exciting as if by alcohol or a narcotic More Definitions → |
| impartiality | 1. an inclination to weigh both views or opinions equally More Definitions → |
| inconclusive | 1. not conclusive; not putting an end to doubt or question More Definitions → |
| intersecting | 1. crossed or intersected in the form of an X More Definitions → |
| inapplicable | 1. not capable of being applied More Definitions → |
| inexplicable | 1. incapable of being explained or accounted for More Definitions → |
| invigorating | 1. imparting strength and vitality More Definitions → |
| intelligible | 1. capable of being apprehended or understood 2. well articulated or enunciated, and loud enough to be heard distinctly More Definitions → |
| insemination | 1. the act of sowing (of seeds in the ground or, figuratively, of germs in the body or ideas in the mind, etc.) 2. the introduction of semen into the genital tract of a female More Definitions → |
| intensifying | 1. increasing in strength or intensity More Definitions → |
| inadmissible | 1. not deserving to be admitted More Definitions → |
| intercession | 1. a prayer to God on behalf of another person 2. the act of intervening (as to mediate a dispute, etc.) More Definitions → |
| inadequately | 1. in an inadequate manner or to an inadequate degree More Definitions → |
| invisibility | 1. the quality of not being perceivable by the eye More Definitions → |
| impenetrable | 1. permitting little if any light to pass through because of denseness of matter 2. impossible to understand More Definitions → |
| impressively | 1. in an impressive manner More Definitions → |
| inextricably | 1. in an inextricable manner More Definitions → |
| irregularity | 1. behavior that breaches the rule or etiquette or custom or morality 2. not characterized by a fixed principle or rate; at irregular intervals More Definitions → |
| indomethacin | 1. a nonsteroidal anti-inflammatory drug (trade name Indocin) More Definitions → |
| inexplicably | 1. in a manner differing from the usual or expected More Definitions → |
| interdiction | 1. authoritative prohibition 2. a court order prohibiting a party from doing a certain activity More Definitions → |
| intrauterine | 1. within the womb More Definitions → |
| imperfection | 1. the state or an instance of being imperfect More Definitions → |
| indisputable | 1. not open to question; obviously true 2. impossible to doubt or dispute More Definitions → |
| immeasurable | 1. beyond calculation or measure 2. impossible to measure More Definitions → |
| infotainment | 1. a film or TV program presenting the facts about a person or event More Definitions → |
| inexperience | 1. lack of experience and the knowledge and understanding derived from experience More Definitions → |
| impersonator | 1. someone who (fraudulently) assumes the appearance of another More Definitions → |
| interrogator | 1. a questioner who is excessively harsh More Definitions → |
| invalidation | 1. (law) a formal termination (of a relationship or a judicial proceeding etc) 2. when a person's thoughts and feelings are rejected, ignored, or judged. More Definitions → |
| interminable | 1. tiresomely long; seemingly without end More Definitions → |
| indefensible | 1. (of theories etc) incapable of being defended or justified 2. not able to be protected against attack More Definitions → |
| immaculately | 1. in an immaculate manner More Definitions → |
| immeasurably | 1. to an immeasurable degree; beyond measurement 2. without bounds More Definitions → |
| inhospitable | 1. unfavorable to life or growth 2. not hospitable More Definitions → |
| incompletely | 1. not to a full degree or extent More Definitions → |
| incalculable | 1. not able to be computed or enumerated 2. too much to be measured More Definitions → |
| interjection | 1. an abrupt emphatic exclamation expressing emotion 2. the action of interjecting or interposing an action or remark that interrupts More Definitions → |
| industrially | 1. by industrial means More Definitions → |
| impregnation | 1. material with which something is impregnated 2. the process of totally saturating something with a substance More Definitions → |
| invalidating | 1. establishing as invalid or untrue More Definitions → |
| irreversibly | 1. in an irreversible manner More Definitions → |
| irresistibly | 1. incapable of being resisted More Definitions → |
| intransitive | 1. a verb (or verb construction) that does not take an object 2. designating a verb that does not require or cannot take a direct object More Definitions → |
| inaccurately | 1. in an inaccurate manner More Definitions → |
| invulnerable | 1. immune to attack; impregnable More Definitions → |
| indiscretion | 1. the trait of being injudicious 2. a petty misdeed More Definitions → |
| isolationism | 1. a policy of nonparticipation in international economic and political relations More Definitions → |
| isolationist | 1. of or relating to isolationism 2. an advocate of isolationism in international affairs More Definitions → |
| insufferable | 1. unbearably arrogant or conceited 2. too extreme to bear More Definitions → |
| interlocutor | 1. the performer in the middle of a minstrel line who engages the others in talk 2. a person who takes part in a conversation More Definitions → |
| insecticidal | 1. of or relating to insecticide More Definitions → |
| inarticulate | 1. without or deprived of the use of speech or words More Definitions → |
| iconoclastic | 1. characterized by attack on established beliefs or institutions 2. destructive of images used in religious worship; said of religions, such as Islam, in which the representation of living things is prohibited More Definitions → |