What is the opposite of unfrivolous?

Need antonyms for unfrivolous? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Lacking in seriousness or maturity
more ❯
“This is neither the time nor place for any of your silly antics.”
Adjective
Lacking importance
more ❯
Find more words!
Use * for blank tiles (max 2) Advanced Search Advanced Search
Use * for blank spaces Advanced Search
Advanced Word Finder
Watch and Learn
Nearby Words
Find Antonyms
go
Word Tools Finders & Helpers Other Languages More Synonyms
Copyright WordHippo © 2019