FRIVOLOUS
frivolous
(adjective) not serious in content or attitude or behavior; “a frivolous novel”; “a frivolous remark”; “a frivolous young woman”
Source: WordNet® 3.1
Etymology
Adjective
frivolous (comparative more frivolous, superlative most frivolous)
Silly, especially at an inappropriate time or in an inappropriate manner.
Of little weight or importance; not worth notice; slight.
(law, said of a lawsuit) Having no reasonable prospect of success because its claim is without merit, lacking a supporting legal or factual basis, while the filing party is, or should be, aware of this.
Source: Wiktionary
Friv"o*lous, a. Etym: [L. frivolus; prob. akin to friare to rub,
crumble, E. friable: cf. F. frivole.]
1. Of little weight or importance; not worth notice; slight; as, a
frivolous argument. Swift.
2. Given to trifling; marked with unbecoming levity; silly;
interested especially in trifling matters.
His personal tastes were low and frivolous. Macaulay.
Syn.
– Trifling; trivial; slight; petty; worthless.
– Friv"o*lous*ly, adv.
– Friv"o*lous*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition