frivolous

As an adjective frivolous

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

As a noun vexation is

the act of annoying, vexing, or irritating.

As adjectives the difference between frivolous and sluggish

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while sluggish is habitually idle and lazy; slothful; dull; inactive; as, a sluggish man.

As adjectives the difference between frivolous and lousy

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while lousy is remarkably bad; of poor quality, dirty, or underhanded; mean, contemptible.

As adjectives the difference between frivolous and insignificant

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while insignificant is not significant; not important, consequential, or having a noticeable effect.

As adjectives the difference between frivolous and unideaed

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while unideaed is (archaic) having no ideas; senseless; frivolous.

As adjectives the difference between frivolous and overlight

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while overlight is (dated) too light or frivolous; giddy.

As a verb overlight is

to illuminate too brightly.

As a noun overlight is

excessive light.

As adjectives the difference between frivolous and exsufflicate

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while exsufflicate is empty, inflated, frivolous.

As an adjective frivolous

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

As an adverb unfrivolously is

in a manner that is not frivolous.

As an adjective frivolous

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

As a noun sexcapade is

(humorous) a frivolous or overactive sexual act.

As an adjective frivolous

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

As a noun franion is

(obsolete) a cheerful, frivolous person, a silly man; a loose woman.