Antonym of Serious

Antonyms

He is very serious by temperament.

  1. grave
  2. trivial
  3. sober
  4. stupid

Answer

Serious means demanding or characterised by careful consideration or application.

For example: Marriage is a serious matter.

Synonyms: important, significant

Antonyms: trivial, unimportant, superficial

The correct option is B.