21
serious
8
humorless
7
very upset
6
grave
5
sad(adjective, happy, joy, glad, merry)
2
unsmiling
2
black
2
blue
2
cloudy
1
somber
1
cheerless
1
bad
1
besieged
1
bleak
1
calamitous
1
concave
1
cruel
1
darker
1
deep
1
dejected
10 years ago|1.4k views|share |citing 
APASmart Define. (2016). hilarious thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/hilarious/thesaurus/antonyms
ChicagoSmart Define. 2016. "hilarious thesaurus" https://smartdefine.org/hilarious/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, hilarious thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/hilarious/thesaurus/antonyms>.
MLASmart Define. "hilarious thesaurus" 1 April 2016. Web. 26 September 2026. <https://smartdefine.org/hilarious/thesaurus/antonyms>