All frivolous antonyms
friv·o·lous
F f adj frivolous
- sensible — having, using, or showing good sense or sound judgment: a sensible young woman.
- intelligent — having good understanding or a high mental capacity; quick to comprehend, as persons or animals: an intelligent student.
- wise — having the power of discerning and judging properly as to what is true or right; possessing discernment, judgment, or discretion.
- mature — complete in natural growth or development, as plant and animal forms: a mature rose bush.
- grave — the grave accent.
- serious — of, showing, or characterized by deep thought.
- solemn — grave, sober, or mirthless, as a person, the face, speech, tone, or mood: solemn remarks.
- thoughtful — showing consideration for others; considerate.