13-Letter Words Starting with I

Imperceptible.

Flea's alarmed discovery (wordplay)

Impossible to feel

Too slight to be noticed

Imperceptive.

Not allowed

IMPERSONAL Not personal; not representing a person; not having personality.

Calm after suffering a terrible bump

Cool as a cucumber

Keeping calm

Impossible to carry out

Unable to be done

Not feasible

See Improvvisatore. Improvvisatore.

Not appreciable; too small to be perceived; incapable of being duly valued or estimated.

Wrong trousers cut below hip

Out of place

Out of keeping

""Incorporating or tending to incorporate; as, the incorporative languages (as of the Basques, North American Indians, etc. ) which run a whole phrase into one word. as, the incorporative languages (as of the Basques, North American Indians, etc. ) which run a whole phrase into one word.""

Proof against decay or bribery

Honest, and disposed to err in public

Not subject to decay

Key spies blend in somehow, casing area

Like many an office aide

Vital hip damage straddling fences

Incapable of being explained; inexplicable.

Beyond description

Beyond words

Cool three drinks clutching bottle opener? It's dreadful!

Invulnerable

A specialized sensory nerve receptor that receives and responds to stimuli originating from within the body.

OPERABLE {usable=adj}

PARTICLE a very small piece or part

PERMEATE to spread through

INTERPOLATE To renew; to carry on with intermission.

Admitting of interpretation; capable of being interpreted or explained.

Computer Science A signal to a computer that stops the execution of a running program so that another action can be performed.

Given to study of one's inner self

Given to self-examination

Inward-looking

Peel lacier bra off, precious!

Without any substitute

Cannot be substituted

Too lively to control

Not willing to be restrained

Not capable of being controlled

Prison rebel is turning reckless ...

*Van Heusen/Cahn classic

Unaccountable or unreliable