inappropriate

As adjectives the difference between inappropriate and decorous

is that inappropriate is not appropriate; not suitable for the situation, time, and/or place while decorous is marked by proper behavior.

As adjectives the difference between opaque and inappropriate

is that opaque is neither reflecting nor emitting light while inappropriate is not appropriate; not suitable for the situation, time, and/or place.

As a noun opaque

is (obsolete|poetic) an area of darkness; a place or region with no light.

As a verb opaque

is to make, render (more) opaque.

As adjectives the difference between inappropriate and sassy

is that inappropriate is not appropriate; not suitable for the situation, time, and/or place while sassy is impudent.

As adjectives the difference between inappropriate and unallowed

is that inappropriate is not appropriate; not suitable for the situation, time, and/or place while unallowed is not allowed, forbidden.

As adjectives the difference between inappropriate and false

is that inappropriate is not appropriate; not suitable for the situation, time, and/or place while false is (label) one of two states of a boolean variable; logic.

As adjectives the difference between incompatible and inappropriate

is that incompatible is of two things: that cannot coexist; not congruous because of differences; irreconcilable; disagreeing while inappropriate is not appropriate; not suitable for the situation, time, and/or place.

As a noun incompatible

is (medicine|chemistry|chiefly|in the plural) an incompatible substance; one of a group of things that cannot be placed or used together because of a change of chemical composition or opposing medicinal qualities.

As adjectives the difference between inexcusable and inappropriate

is that inexcusable is not excusable while inappropriate is not appropriate; not suitable for the situation, time, and/or place.

As adjectives the difference between inappropriate and atypical

is that inappropriate is not appropriate; not suitable for the situation, time, and/or place while atypical is not conforming to the normal type.

As a noun atypical is

(pharmacy) an atypical antipsychotic.

As adjectives the difference between inappropriate and seemly

is that inappropriate is not appropriate; not suitable for the situation, time, and/or place while seemly is (of behavior) appropriate; suited to the occasion or purpose; becoming.

As an adverb seemly is

appropriately, fittingly.

As adjectives the difference between inappropriate and undefined

is that inappropriate is not appropriate; not suitable for the situation, time, and/or place while undefined is lacking a definition or value.