1
solemn
1
stern
1
stressful(adjective, state, feeling, calmness)
1
sullen
1
uncheerful
1
unsatisfied
1
unsmiling
1
wary
1
weighty
1
woebegone
1
woeful
0
aching
0
acid
0
affronted
0
aggravated
0
aghast
0
agonized
0
alcoholic
0
anguished
0
ascetical
10 years ago|2.5k views|share |citing 
APASmart Define. (2016). lighthearted thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/lighthearted/thesaurus/antonyms
ChicagoSmart Define. 2016. "lighthearted thesaurus" https://smartdefine.org/lighthearted/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, lighthearted thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/lighthearted/thesaurus/antonyms>.
MLASmart Define. "lighthearted thesaurus" 30 March 2016. Web. 24 September 2026. <https://smartdefine.org/lighthearted/thesaurus/antonyms>