impute, imputed, imputing, imputes.transitive verbs
inflected form(s)-imputed, imputing
to credit to a person or a cause; attribute; to lay the responsibility or blame for, often falsely or unjustly (he kindly imputed my clumsiness to inexperience); to charge with the fault or responsibility for (imputed the rocket failure to a faulty gasket); to attribute; credit
imputability.noun
imputable.adjective
synonym.ascribe

inconsiderate.adjective
heedless; thoughtless; careless of the rights or feelings of others 
inconsiderateness, inconsideration.nouns
inconsiderately.adverb

incontinence.noun
the quality or state of being incontinent (see continence); failure to restrain sexual appetite; unchastity; inability of the body to control the evacuative functions

incorrigible.adjective
incapable of being corrected or amended; not reformable; depraved; delinquent; nor manageable; unruly; unalterable; inveterate 
incorrigibility, incorrigible
incorrigibleness.nouns
incorrigibly.adverb

incredulity.noun
the state or quality of being incredulous; disbelief

incredulous.adjective
unwilling to admit or accept what is offered as true; not credulous; skeptical; incredible; expressing incredulity
unwilling to admit or accept what is offered as true (his explanation met an incredulous response from his listeners)
incredulously.adverb
incredulousness.noun
synonyms.aporetic, disbelieving, questioning, quizzical, show me, skeptical, unbelieving
antonym.credulous

inefficacy.noun
lack of power to produce a desired effect

insidious.adjective
working or spreading harmfully in a subtle or stealthy manner; having a gradual and cumulative harmful effect; developing so gradually as to be well established before becoming apparent; awaiting a chance to entrap; treacherous; seductive; subtle
insidiousness.noun
insidiously.adverb

ignominious.adjective
marked by shame or disgrace; deserving disgrace or shame; despicable; degrading; debasing
ignominiously.adverb
ignominiousness.noun
ignominy.noun,.plural.ignominies
great personal dishonor or humiliation; disgrace; shameful or disgraceful action, conduct, or character

impetus.noun
inner movement of the mind leading to action; impulse; incentive; stimulus; the stimulation or encouragement resulting in increased activity

impetuous.adjective
rushing; acting suddenly with little thought; harebrained; impulsive and passionate; characterized by sudden and forceful energy or emotion; moving with great force (impetuous, heaving waves); having great impetus; 
impetuously.adverb
impetuousness.noun

insufficient.adjective
not sufficient; inadequate
insufficiently.adverb

insufficiency.noun,.plural.insufficiencies
the quality or state of being insufficient, especially; inadequate supply (an insufficiency of funds)

initial.adjective
of or relating to the beginning; incipient; placed at the beginning; first 
initialness.noun
initially.adverb

initiate, initiated, initiating, initiates.transitive verbs
to set going by taking the first step; begin ( initiated trade with developing nations); to bring into practice or use; introduce by first doing or using; to introduce to a new field, interest, skill, or activity
initiate.noun
one who is being or has been initiated; one who has been introduced to or has attained knowledge in a particular field
initiator.noun

initiation.noun
the act or an instance of initiating; the process of being initiated; the condition of being initiated; a ceremony, ritual, test, or period of instruction with which a new member is admitted to an organization or office or to knowledge

impose, imposed, imposing, imposes.verbs
transitive verb use.dictate; to establish or apply as compulsory; levy (impose a tax); to apply or make prevail by or as if by authority (impose a peace settlement); to obtrude or force (oneself, for example) on another or others
intransitive verb use.to take unfair advantage (you are always imposing on their generosity)
imposer.noun

imposing.adjective
impressive, as by virtue of size, bearing, or power (his imposing aura presupposed a great presence); grand
imposingly.adverb

imposition.noun
the act of imposing or the condition of being imposed; something imposed, such as a tax, an undue burden, or a fraud; a burdensome or unfair demand, as upon someone's time (listened to the telephone solicitor but resented the imposition)

impression.noun
an effect, a feeling, or an image retained as a consequence of experience; a vague-notion, remembrance, or belief (to the advantage of those assuming administrative powers, the citizens retain a vague notion that the country's formation was based upon established the legal rights of the people); a mark produced on a surface by pressure

impress1, impressed, impressing, impresses.transitive verbs
to affect strongly, often favorably (wrote down whatever impressed me during the journey; was impressed by the child's sincerity); affected by; to produce or attempt to produce a vivid impression or image of (a scene that impressed itself on his memory; tries to impress the value of high values on the students); to mark or stamp with or as if with pressure (impressed a design on the hot wax); to apply with pressure; press
impress.noun
the act of impressing; a mark or pattern produced by or as if by impressing; impression; a stamp or seal meant to be impressed

impress2, impressed, impressing, impresses.transitive verbs
to compel (a person) to serve in a military force; to seize (property) by force or authority; confiscate
impress, impressment.nouns

impressive.adjective
making a strong or vivid impression; striking or remarkable (the wedding was an impressive ceremony)
impressively.adverb
impressiveness.noun

inadequate.adjective
not adequate to fulfill a need or meet a requirement; insufficient
inadequately.adverb

inadequacy.noun,.plural.inadequacies
the quality or condition of being inadequate; an instance of being inadequate; a failing or lack

irrespective.adjective
characterized by disregard; heedless
irrespectively.adverb

infiltrate, infiltrated, infiltrating, infiltrates.verbs
transitive verb use.to enter or take up positions in gradually or surreptitiously, as for purposes of espionage or takeover (tried to infiltrate key government agencies with spies); to cause (a liquid, for example) to permeate a substance by passing through its interstices or pores; to permeate (a porous substance) with a liquid or gas
intransitive verb use.to gain entrance gradually or surreptitiously
infiltrate.noun
one that infiltrates, especially an abnormal substance that accumulates gradually in cells or body tissues
infiltrator.noun

invigorate, invigorated, invigorating, invigorates.transitive verbs
to impart vigor, strength, or vitality to; animate
invigoratingly.adverb
invigoration, invigorator.nouns

inkling.noun
a slight hint or indication; a slight understanding or vague idea or notion

intrigue, intrigued, intriguing, intrigues.verbs
intransite use.to engage in secret or underhand schemes for selfish advantage; plot
transitive use.to effect by secret scheming or plotting; to arouse the interest or curiosity of (hibernation has long intrigued biologists)
intriguer.noun
intriguingly.adverb
intrigue.noun
a secret or underhand scheme; a plot; the practice of or involvement in such schemes; conspiracy; a clandestine love affair