Frivolous
Pronunciation : Friv"o*lous
Part of Speech : a.
Etymology : [L. frivolus; prob. akin to friare to rub, crumble, E. friable: cf. F. frivole.]
Definition : 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