frivolous

As an adjective frivolous

is silly, especially at an inappropriate time or in an inappropriate manner.

As a noun sensibility is

the ability to sense, feel or perceive; especially to be sensitive to the feelings of another.

As adjectives the difference between frivolous and proper

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while proper is (lb) suitable .

As an adverb proper is

(scotland) properly; thoroughly; completely.

As adjectives the difference between frivolous and logical

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while logical is in agreement with the principles of logic.

As adjectives the difference between frivolous and practical

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while practical is based on practice or action rather than theory or hypothesis.

As a noun practical is

a part of an exam or series of exams in which the candidate has to demonstrate their practical ability.

As a noun grave

is cave, den, lair.

As an adjective frivolous is

silly, especially at an inappropriate time or in an inappropriate manner.

As a proper noun goofy

is a character: a slow-witted anthropomorphic dog with a goofy laugh.

As an adjective frivolous is

silly, especially at an inappropriate time or in an inappropriate manner.

As adjectives the difference between frivolous and significant

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while significant is signifying something; carrying meaning.

As a noun significant is

that which has significance; a sign; a token; a symbol.

As adjectives the difference between cavalier and frivolous

is that cavalier is not caring enough about something important while frivolous is silly, especially at an inappropriate time or in an inappropriate manner.

As a noun cavalier

is a military man serving on horse.

As adjectives the difference between frivolous and vexatious

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while vexatious is causing vexation or annoyance; teasing; troublesome.

As adjectives the difference between austere and frivolous

is that austere is austere while frivolous is silly, especially at an inappropriate time or in an inappropriate manner.