friv-o-lous / frĭv-ə-ləs
1. not serious; silly; foolish
One who is serious all day will never have a good time, while one who is frivolous all day will never establish a household.
Ptahhotpe, c. 25th – 24th century B.C.
2. of little weight or importance; trivial
It is an endless and frivolous pursuit to act by any other rule than the care of satisfying our own minds in what we do.
Richard Steele, 1672 – 1729