interim.noun
an intervening time; interval

interval.noun
a space of time between events or states; intermission; a space between objects, units, points, or states 
intervallic.adjective

illiterate.adjective
having little or no education; especially: unable to read or write; showing or marked by a lack of familiarity with language and literature; violating approved patterns of speaking or writing; showing or marked by a lack of acquaintance with the fundamentals of a particular field of knowledge 
illiterate, illiterateness.nouns
illiterately.adverb
synonym.ignorant

impertinent.adjective
not pertinent; irrelevant; not restrained within due or proper bounds especially of propriety or good taste (impertinent curiosity): implies exceeding the bounds of propriety in showing interest or curiosity or in offering advice (resented their impertinent interference) 
impertinently.adverb
synonyms.obstrusive; officious; meddlesome; intrusive (see just below)

officious implies the offering of services or attentions that are unwelcome or annoying (officious friends made the job harder)

meddlesome stresses an annoying and usually prying interference in others' affairs (a meddlesome landlord)

intrusive implies a tactless or otherwise objectionable thrusting into others' affairs (tried to be helpful without being intrusive)

implicit.adjective
being without doubt or reserve; unquestioning; capable of being understood from something else though unexpressed; implied (an implicit assumption); involved in the nature or essence of something though not revealed, expressed, or developed; potential; explicit 
compare-explicit
implicitness.noun
implicitly.adverb

implicitly.adjective
being without doubt or reserve; unquestioning
implicitness.noun
implicitly.adverb

inadvertent.adjective
not focusing the mind on a matter; inattentive; unintentional; careless
inadvertently.adverb

infer, inferred, inferring, infers.transitive verb
to draw as a conclusion from something assumed or known; imply; to conclude from evidence or premises; conjecture; to reason from circumstance; surmise; to lead to as a consequence or conclusion (Socrates argued that a statue inferred the existence of a sculptor); to hint
intransitive verb use.to draw inferences; conjecture
inferable.adjective
inferably.adverb
inferrer.noun

indelible.adjective
impossible to remove, erase, or wash away; permanent (indelible ink)
indelibility.or.indelibleness.noun
indelibly.adverb

inference.noun
logical conclusion or deduction
inferential.adjective
of, relating to, or involving inference; derived or capable of being derived by inference
inferentially.adverb

ingrained.adjective
worked into the grain or fiber; forming a part of the essence or inmost being; firmly established; deep seated (ingrained prejudice); worked deeply into the texture or fiber: (a carpet disfigured by ingrained dirt)
ingrainedly.adverb
ingrain.transitive verb 
to work indelibly into the natural texture or mental or moral.constitution
synonym.infuse

irrepressible.adjective
difficult or impossible to control or restrain (irrepressible laughter)
irrepressibility.or.irrepressibleness.noun
irrepressibly.adverb

imagine, imagined, imagining, imagines.transitive verb
to form a mental picture or image of; to think; conjecture.(I imagine you're right); to have a notion of or about without adequate foundation; fancy.(she imagines herself to be a true artist)
intransitive verb use.to employ the imagination; to make a guess; conjecture
imaginer.noun

imaginary.adjective
having existence only in the imagination
imaginarily.adverb
imaginariness.noun
imaginary.noun, plural.imaginaries
Mathematics.-.of, relating to, or being the coefficient of the imaginary unit in a complex number; of, relating to, involving, or being an imaginary number; involving only a complex number of which the real part is zero

imagination.noun
the formation of a mental image of something that is neither perceived as real nor present to the senses; the mental image so formed; the ability or tendency to form such images; the ability to confront and deal with reality by using the creative power of the mind; resourcefulness (handled the problems with great imagination)
imaginational.adjective

image.noun
a reproduction of the form of a person or an object, especially a sculptured likeness; one that closely or exactly resembles another; a double (he is the image of his uncle); an opinion or concept of something that is held in the mind; one's character projected to the public (the image one gives off)
imageless.adjective

initial.adjective
of, relating to, or occurring at the beginning; first (took the initial step toward reconciliation); designating the first letter or letters of a word
initial.noun
the first letter of a proper name; initials; the first letter of each word of a person'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.initialled, initialing, initialling, initials, initials.transitive verbs
to mark or sign with initials, especially for purposes of authorization or approval
initially.adverb
initialness.noun

initiate, initiated, initiating, initiates.transitive verbs
to set going by taking the first step; begin (initiated trade with developing nations); begin (the meeting initiated an idea that brought up feelings of past injustices); to introduce to a new field, interest, skill, or activity; to admit into membership, as with ceremonies or ritual
initiate.adjective
initiated or admitted, as to membership or a position of authority
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

initiatory.adjective
introductory; initial; tending or used to initiate

initiative.noun
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
idiom.on (one's) own initiative; without prompting or direction from others; on one's own
initiatively.adverb

indolent.adjective
disinclined to exert oneself; habitually lazy; conducive to inactivity or laziness; lethargic.(humid, indolent weather makes one feel like just lazing around)
indolently.adverb
indolence.noun
habitual laziness; sloth

infantile.adjective
of or relating to infants or infancy; displaying or suggesting a lack of maturity; extremely childish

invert, inverted, inverting, inverts.verbs
transitive verb use.to turn inside out or upside down (invert an hourglass); to reverse the position, order, or condition of (invert the subject and predicate of a sentence); to subject to inversion; reverse
intransitive verb use.to be subjected to inversion
invert.noun
something inverted
invertible.adjective

inverse.adjective
reversal; inverted; directly opposite

inversion.noun
the act of inverting; the state of being inverted; an interchange of position of adjacent objects in a sequence.(a change in normal word order, such as the placement of a verb before its subject)
Meteorology.-.an atmospheric condition in which the air temperature rises with increasing altitude, holding surface air down and preventing dispersion of pollutants
Genetics.-.a chromosomal defect in which a segment of the chromosome breaks off and reattaches in the reverse direction
Chemistry.-.conversion of a substance in which the direction of optical rotation is reversed, from the dextrorotatory (clockwise) to the levorotatory (counterclockwise) or from the levorotatory to the dextrorotatory form