improper

Improper is a related term of extreme.

As an adjective improper

is unsuitable to needs or circumstances; inappropriate; inapt.

As a verb improper

is (obsolete|transitive) to appropriate; to limit.

As a noun extreme is

.

Improper is a related term of horrible.

As adjectives the difference between improper and horrible

is that improper is unsuitable to needs or circumstances; inappropriate; inapt while horrible is causing horror; terrible; shocking.

As a verb improper

is (obsolete|transitive) to appropriate; to limit.

As a noun horrible is

a thing that causes horror; a terrifying thing, particularly a prospective bad consequence asserted as likely to result from an act.

Inefficient is a related term of improper.

As adjectives the difference between inefficient and improper

is that inefficient is inefficient while improper is unsuitable to needs or circumstances; inappropriate; inapt.

As a verb improper is

(obsolete|transitive) to appropriate; to limit.

Improper is a related term of contemptible.

As adjectives the difference between improper and contemptible

is that improper is unsuitable to needs or circumstances; inappropriate; inapt while contemptible is deserving contempt.

As a verb improper

is (obsolete|transitive) to appropriate; to limit.

Improper is a related term of cross.

As an adjective improper

is unsuitable to needs or circumstances; inappropriate; inapt.

As a verb improper

is (obsolete|transitive) to appropriate; to limit.

As a proper noun cross is

for someone who lived near a stone cross on a road.

Depraved is a related term of improper.

As verbs the difference between depraved and improper

is that depraved is (deprave) while improper is (obsolete|transitive) to appropriate; to limit.

As adjectives the difference between depraved and improper

is that depraved is perverted or extremely wrong in a moral sense while improper is unsuitable to needs or circumstances; inappropriate; inapt.

As adjectives the difference between disproportionate and improper

is that disproportionate is not proportionate while improper is unsuitable to needs or circumstances; inappropriate; inapt.

As verbs the difference between disproportionate and improper

is that disproportionate is (chemistry) to undergo disproportionation while improper is (obsolete|transitive) to appropriate; to limit.

As adjectives the difference between perverse and improper

is that perverse is turned aside; hence, specifically, turned away from the (morally) right; willfully erring; wicked; perverted while improper is unsuitable to needs or circumstances; inappropriate; inapt.

As a verb improper is

(obsolete|transitive) to appropriate; to limit.

Mistaken is a related term of improper.

As verbs the difference between mistaken and improper

is that mistaken is while improper is (obsolete|transitive) to appropriate; to limit.

As adjectives the difference between mistaken and improper

is that mistaken is erroneous while improper is unsuitable to needs or circumstances; inappropriate; inapt.

Insufficient is a related term of improper.

As adjectives the difference between insufficient and improper

is that insufficient is not sufficient while improper is unsuitable to needs or circumstances; inappropriate; inapt.

As a verb improper is

(obsolete|transitive) to appropriate; to limit.