irrevocable.adjective
impossible to retract or revoke-(an irrevocable decision)
irrevocability or irrevocableness.noun
irrevocably.adjective

inferior.adjective
low or lower in order, degree, or rank (captain is an inferior rank to major); low or lower in quality, value, or estimation (inferior craft; felt inferior to his older sibling); second rate; poor (an inferior student; situated under or beneath
Anatomy.–.located beneath or directed downward
inferior.noun
a person lower in rank, status, or accomplishment than another
inferiority.noun

inessential.adjective
not essential; unessential; without essence
inessential.noun
something that is not essential
inessentiality.noun

ignore, ignored, ignoring, ignores.transitive verbs
to refuse to pay attention to; disregard
ignorable.adjective
ignorer.noun

insincere.adjective
not sincere; hypocritical
insincerely.adverb
insincerity.noun

imbibe, imbibed, imbibing, imbibes.verbs
transitive verb use.to drink; to receive and absorb into the mind; permeate; saturate
intransitive verb use.to drink beverages, often ones containing alcohol
imbiber.noun

impoverished.adjective
unable to function normally; reduced to poverty; poverty-stricken; poor; deprived of natural richness or strength; depleted.(an impoverished speech; a region impoverished by drought)
impoverish, impoverished, impoverishing, impoverishes.transitive verbs
to reduce to poverty; make poor; to deprive of natural richness or strength (impoverish the soil by overuse and forcing it with chemical fertilizers making it harder to till); deplete
impoverishment.noun

indirect.adjective
diverging from a direct course; roundabout; not proceeding straight to the point or object; not forthright and candid; devious; not directly planned for; secondary (indirect benefits)
indirectly.adverb
indirectness.noun

inquisitive.adjective
curious and inquiring; inclined to investigate; eager for knowledge
inquisitively.adverb
inquisitiveness.noun

item.noun
single article or unit in a collection, an enumeration, or a series; a clause of a document, such as a bill or charter; an entry in an account; a bit of information; a detail
item.adverb
used to introduce each article in an enumeration or a list
item, itemed, iteming, items.transitive verbs
itemize, itemized, itemizing, itemizes.verbs
transitive verb use.to set down item by item; list
intransitive verb use.to list for recapitulation
itemization, itemizer.nouns

indices.noun
plural of index
index.noun,.plural.indexes.or.indices
something that serves to guide, point out, or otherwise facilitate reference, especially (an alphabetized list of names, places, and subjects treated in a printed work, giving the page or pages on which each item is mentioned
index, indexed, indexing, indexes.transitive verbs
to furnish with an index (index a book); to enter in an index
indexer.noun

independent.adjective
able to act as a free man under God accountable only to principles of the universe which are all based upon the love principle; self-governing; free from the influence, guidance, or control of another or others (an independent mind). 3. Not determined or influenced by someone or something else at the physical level);
Mathematics.-.not dependent on other variables; of or relating to a system of equations no one of which can be derived from another equation in the system

independence.noun
the state or quality of being independent

irresistible.adjective
impossible to resist.(an irresistible impulse to sneeze); having an overpowering appeal (irresistible beauty)
irresistibility.or.irresistibleness.noun
irresistibly.adverb

intonation.noun
the act of intoning or chanting; a manner of producing or uttering tones, especially with regard to accuracy of pitch
Linguistics.-.the use of changing pitch to convey syntactic information (a questioning intonation); a use of pitch characteristic of a speaker or dialect
intonational.adjective

intone, intoned, intoning, intones.verbs
transitive verb use.to recite in a singing tone; to utter in a monotone (no voice inflection)
intransitive verb use.to speak with a singing tone or with a particular.intonation
intonement, intoner.nouns

invest, invested, investing, invests.verbs
transitive verb use.to endow with authority or power; to instal in office with ceremony (invested a new dictator the people didn't want); to spend or devote for future advantage or benefit (invested much time and energy in getting a good education); to commit (money or capital) in order to gain a financial return (invested some savings in stocks and bonds)
intransitive verb use.to make investments or an investment (invest in real estate)
investable.adjective
investor.noun

investiture.noun
the act or formal.ceremony of conferring the authority and symbols of a high office; an adornment or a cover

incumbent.adjective
currently holding a specified office (the incumbent mayor); imposed as an obligation or a duty; obligatory (felt it was incumbent on us all to help); lying, leaning, or resting on something else (incumbent rock strata)
incumbent.noun
a person who holds an office
incumbently.adverb

incriminate, incriminated, incriminating, incriminates.transitive verbs
to accuse of a crime or other wrongful act; to cause to appear guilty of a crime or fault; implicate (the evidence lacked proof of incrimination)
incrimination.noun
incriminatory.adjective