frivolous
/ˈfrɪvələs/adjective
1- not having any serious purpose or value无严肃目的的, 无意义的, 无价值的：
rules to stop frivolous law suits.
制止为琐事打官司的规章。
1.1
- (of a person) carefree and not serious（人）轻薄的, 轻浮的。
派生词
frivolity
nounfrivolously
adverbfrivolousness
noun词源
late Middle English: from Latin frivolus 'silly, trifling' + -OUS.