1. 琐事;小事
If you refer to something as a triviality, you think that it is unimportant and not serious.

1. something of small importance

Synonym: triviatriflesmall beer

2. the quality of being unimportant and petty or frivolous

Synonym: pettinessslightnesspuniness

3. a detail that is considered insignificant

Synonym: technicalitytrifle