2
tranquil
2
unserious
2
unstoppable
1
acquiescent
1
affable
1
agree
1
amenable
1
blithe
1
bod
1
bow
1
bulging
1
complaisant
1
compliant
1
cordial
1
featherbrained
1
flighty
1
forbearing
1
frisky
1
frivolous
1
frolicsome
10 years ago|4.2k views|share |citing 
APASmart Define. (2016). stern thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/stern/thesaurus/antonyms
ChicagoSmart Define. 2016. "stern thesaurus" https://smartdefine.org/stern/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, stern thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/stern/thesaurus/antonyms>.
MLASmart Define. "stern thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/stern/thesaurus/antonyms>