FRIVOL
frivol, trifle
(verb) act frivolously
Source: WordNet® 3.1
Etymology
Verb
frivol (third-person singular simple present frivols, present participle frivoling or frivolling, simple past and past participle frivoled or frivolled)
(intransitive) To behave frivolously.
(intransitive) To trifle.
Noun
frivol (plural frivols)
An unserious person; a shallow person.
An idle diversion or pastime; a frivolity.
Source: Wiktionary
Friv"ol, v. i.
Definition: To act frivolously; to trifle. Kipling. -- Friv"ol*er (#),
Friv"ol*ler, n. [All Colloq.]
Source: Webster’s Unabridged Dictionary 1913 Edition