Emily Dickinson Lexicon

FRIV'O-LOUS, a. [L. frivolus, from the root of frio, to break into small pieces, to crumble; Fr. frivole; Sp. and It. frivolo. We observe the same radical letters, Rb, Rv, in trivial, trifle, L. tero, trivi, to rub or wear out. Class Rb.]

Slight; trifling; trivial; of little weight, worth or importance; not worth notice; as, a frivolous argument; a frivolous objection or pretext. Swift.