impute, imputed, imputing, imputes, imputed, imputing.transitive verbs
if you impute something to someone, you attribute or ascribe it to them, say that they are responsible for it or are the cause of it; 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
imputation.noun,.plural.imputations
the act of imputing or ascribing; attribution; something imputed, ascribed or attributed
imputative.adjective
imputatively.adverb
imputability.noun,.plural.imputabilities
imputable.adjective
synonym.ascribe

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

incontinence.noun,.plural.incontinences
the quality or state of being incontinent (see continence); failure to restrain sexual appetite; unchastity; inability of the body to control the evacuative functions
incontinency.noun,.plural.incontinencies
involuntary.urination (peeing) or defecation (pooping)

incorrigible.adjective
seemingly.incapable of being corrected or amended; seemingly not reformable; depraved; delinquent; not manageable; unruly; firmly rooted; unalterable; inveterate
incorrigible.noun,.plural.incorrigibles
incorrigibility.noun,.plural.incorrigibilities
incorrigibleness.noun,.plural.incorrigiblenesses
incorrigibly.adverb

incredible.adjective
so implausible as to elicit disbelief (gave an incredible story of why she missed classes); astonishing (got dressed with incredible speed)
incredibly.adverb
incredibility.noun,.plural.incredibilities
incredibleness.noun,.plural.incrediblenesses

incredulity.noun,.plural.incredulities
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,.plural.incredulousnesses
synonyms.disbelieving, questioning, quizzical, show me, skeptical, unbelieving
antonym.credulous

inefficacy.noun,.plural.inefficacies
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
insidiously.adverb
insidiousness.noun,.plural.insidiousnesses

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

impetuous.adjective
if you describe someone as impetuous, you mean that they are likely to act quickly and suddenly without thinking or being careful; impulsive; rushing; acting suddenly with little thought; harebrained; passionate; characterized.by sudden and forceful energy or emotion; moving with great force (impetuous, heaving waves of the sea); having great impetus
impetuosity.noun,.plural.impetuosities
the quality or condition of being impetuous; an impetuous act
impetuously.adverb
impetuousness.noun,.plural.impetuousnesses

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

insufficient.adjective
not sufficient; inadequate
insufficiently.adverb

initial.adjective
of or relating to or occurring at the beginning; incipient; placed at the beginning; first (took the initial step toward bulging a cabin); designating the first letter or letters of a word
initial.noun,.plural.initials
the first letter of a proper name; initials; the first letter of each word of an individual's complete name considered as a unit (stationery monogrammed with her initials; the first letter of a word); a large, often highly decorated letter set at the beginning of a chapter, verse or paragraph
initial, initialed.also spelt.initialled, initialing, initialling, initials.transitive verbs
to mark or sign with initials for purposes of approval of words on some document
initially.adverb
initialness.noun.(most words ending in 'ess' are usually without pluralization - adding an 'es' making '...esses' is clumsy)

initialize, initialized, initializing, initializes.transitive verbs
Computers:.to set to a starting position or value
initialization.noun,.plural.initializations
initializer.noun,.plural.initializers

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.adjective
initiated or admitted, as to membership or a position of authority
initiate.noun,.plural.initiates
one who is being or has been initiated; one who has been introduced to or has attained knowledge in a particular field
initiator.noun,.plural.initiators
initiation.noun,.plural.initiations
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
initiation.noun,.plural.initiations
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
initiatory.adjective
introductory; initial; tending or used to initiate
initiative.noun,.plural.
a beginning or introductory step; an opening move (took the initiative in trying to solve the problem); the power or ability to begin or to follow through energetically with a plan or task; enterprise and determination; the right and procedure by which citizens can propose a law by petition and ensure its submission to the electorate
initiative.adjective
of or relating to initiation; used to initiate; initiatory
on one's own initiative.idiom
without prompting or direction from others; on one's own
initiatively.adverb

impose, imposed, imposing, imposes.verbs
transitive verb use.to dictate; to establish or apply as compulsory; levy (impose a tax as a means of control; to steal land and that by nefarious.methods.in order to subjugate others); to apply or make prevalent by or as if by authority (impose a peace settlement); to obtrude or force oneself or policies, for example, on another or others, as of totalitarianism
intransitive verb use.to take unfair advantage (always imposing on others for selfish gain)
imposer.noun,.plural.imposers
imposition.noun,.plural.impositions
the act of imposing or the condition of being imposed; imposing is unwanted and unappreciated; something imposed, such as a tax, an undue burden or a fraud; a burdensome or unfair demand, as upon someone's time or wealth (listened to the telephone solicitor but resented the imposition)

imposing.adjective
impressive, as by virtue of size, bearing or power (his imposing aura.presupposed a great presence; the ancient castles of Scotland are imposing, making one think; an imposing statue; the imposing presence of a Cheetah); grand
imposingly.adverb

impression.noun,.plural.impressions
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, citizens retain a vague notion that the country's formation was based upon established legal.rights of the men and women of the nation); a mark produced on a surface by pressure
impressionable.adjective
readily or easily influenced; suggestible (impressionable young people); capable of receiving an impression; plastic (impressionable plaster)
impressionability.noun,.plural.impressionabilities
impressionableness.noun,.plural.impressionablenesses

impress, impressed, impressing, impresses.transitive verbs
if something impresses you, you feel great admiration for it; 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,.plural.impresses
the act of impressing; a mark or pattern produced by or as if by impressing; impression; a stamp or seal meant to be impressed

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

impress, impressed, impressing, impresses.transitive verbs
to compel an individual to serve in a military force; to seize property by force or authority; confiscate
impress.noun,.plural.impresses
impressment.noun,.plural.impressments

inadequate.adjective
not adequate to fulfill a need or meet a requirement (many children have been brought up hearing words that made them feel inadequate if they believed those who they heard such lies from; not good enough at something yet not taught how, causes frustration); 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
without regard to; ignoring or discounting; not taking into consideration (irrespective of the weather, I should go); characterized by disregard; heedless
irrespective of.preposition
without consideration of; regardless of; if you say that something happens or should happen irrespective of a particular thing, you mean that it is not affected or should not be affected by that thing (a society based on equality for all individuals irrespective of ethnic origin)
irrespective,.irrespectively.adverbs
used when saying that a particular fact has no effect on a situation and is not important (the course is open to anyone, irrespective of age)

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, such as in a fifth column movement (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,.plural.infiltrates
one that infiltrates, especially an abnormal substance that accumulates gradually in cells or body tissues
infiltrator.noun,.plural.infiltrators
infiltration.noun,.plural.infiltrations
the act or process of infiltrating; the state of being infiltrated;  something that infiltrates
infiltrative.adjective

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

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

intrigue, intrigued, intriguing, intrigues.verbs
intransite verb use.to engage in secret or underhand.schemes for selfish advantage; plot
transitive verb use.to effect by secret scheming or plotting; to arouse the interest or curiosity of (hibernation has long intrigued biologists); if you describe something as intriguing, you mean that it is interesting and/or unusual
intriguer.noun,.plural.intriguers
intriguingly.adverb
intrigue.noun,.plural.intrigues
a secret or underhand scheme; a plot; the practice of or involvement in such schemes; conspiracy; a clandestine love affair

ingredient.noun,.plural.ingredients
an element in a mixture or compound; a constituent