2
doltish
2
dopey
2
dorky
2
dulled
2
dunderheaded
2
empty-headed
2
feeble
2
flat
2
foolish(adjective, slow)
2
half-witted
2
halfhearted
2
hesitant
2
impassive
2
imperceptive
2
lamebrain
2
languorous
2
lousy
2
lunkheaded
2
mad
2
pointless(adjective, calm, indifferent)
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APASmart Define. (2016). keen thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/keen/thesaurus/antonyms
ChicagoSmart Define. 2016. "keen thesaurus" https://smartdefine.org/keen/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2016, keen thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/keen/thesaurus/antonyms>.
MLASmart Define. "keen thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/keen/thesaurus/antonyms>