I

immutable (adjective)
Unchanging over time or unable to be changed. (OD)
Not capable of or susceptible to change. (MW)
Note:  I did not find this word very interesting until some people decided that it no longer applies to sex.
See:  man, woman

impecunious (adjective)
Having very little or no money, usually habitually; penniless (MW)

in flagrante delicto (adverb)
In the very act of committing a misdeed; red-handed; in the midst of sexual activity. (MW)

inchoate (adjective)
Just begun and so not fully formed or developed; rudimentary. (OD)

incredulous (adjective)
Of a person or their manner:  Unwilling or unable to believe something. (OD)
Unwilling to admit or accept what is offered as true.  Not credulous; skeptical. (MW)
See:  credulous

ineffable (adjective)
Too great or extreme to be expressed or described in words. (OD)
Incapable of being expressed in words; indescribable.  Unspeakable. (MW)

ineffaceable (adjective)
Unable to be erased or forgotten. (OD)

inshallah (expression)
Arabic:  If Allah wills it.
“Resigned, accepting, neutral, passive.  It is neither optimistic nor pessimistic.  It is the opposite of can-do.”
(Cullen Murphy, InshallahThe American Scholar, 2007)
Note:  Fatalistic term which seems to remove one’s own influence (and therefore efforts) over events, placing them rather in the hands of fate.  Too often used as a rather flimsy excuse not to act or try.

intercrural and interfemoral (adjective)
Intercrural:  Between the legs. (OD)  Occurring or taking place between the thighs. (MW)  Interfemoral:  Situated or performed between the thighs. (MW)
Note:  Difference in these terms?

intersectionality (social theory)
The interconnected nature of social categorizations such as race, class, and gender as they apply to a given individual or group, regarded as creating overlapping and interdependent systems of discrimination or disadvantage. (OD)

inveterate (adjective)
Having a particular habit, activity, or interest that is long-established and unlikely to change.  Of a feeling or habit:  Long-established and unlikely to change. (OD)

irenic (adjective)
Favoring, conducive to, or operating toward peace, moderation, or conciliation. (MW)

irrupt (verb)
Enter forcibly or suddenly. (OD)
irruption (noun)

islamophobia (lexical creation)
Islam is a supremacist ideology with a religious component.  The term Islam means submission (to God).  This submission can be voluntary and willing, or by force and coercion if necessary.  Phobia is an irrational fear.  Islamophobia is a factitious term designed and promoted to brand any criticism of Islam as irrational.  The proponents of the term do this by hiding, obfuscating, and/or denying the force/coercion component of said submission.  Thus, if submission only takes place voluntarily, any fear or criticism of it must be irrational or bigoted. (RM)
Note:  It is a masterpiece of propaganda, most often used by people who know little about Islam.

iteration (noun)
The repetition of a process or utterance.  Repetition of a mathematical or computational procedure applied to the result of a previous application, typically as a means of obtaining successively closer approximations to the solution of a problem.  A new version of a piece of computer hardware or software. (OD)

𓐵

H <=> J