1
mendacious
1
perfunctory
1
reckless
1
remiss
1
uncareful(adjective, indifferent, undemanding)
1
uncritical(adjective, indifferent, undemanding)
1
undemanding(adjective, indifferent)
1
untruthful
1
unwary
0
black
0
forgetful
0
absentminded
0
arbitrary
0
atrocious
0
bad
0
base
0
bent
0
bent on
0
blasphemous
0
bohemian
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APASmart Define. (2015). conscientious thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/conscientious/thesaurus/antonyms
ChicagoSmart Define. 2015. "conscientious thesaurus" https://smartdefine.org/conscientious/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2015, conscientious thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/conscientious/thesaurus/antonyms>.
MLASmart Define. "conscientious thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/conscientious/thesaurus/antonyms>