8
shameful
8
sinful(adjective, unethical)
8
shy
8
unprincipled(adjective, good, honest, corrupt)
7
dishonest(adjective, good, open, honest, lying)
7
outrageous
6
opportunistic
6
base
6
disreputable(adjective, dishonorable, reputable, lowly)
5
corrupt(adjective, good, dishonest, moral, unethical)
4
black
4
crooked
4
immoral(adjective, good, moral, unethical)
4
infamous(adjective, shameful, reputation)
4
unconscionable(adjective, immoral, immoderate)
4
unfair(adjective, unethical)
4
unscrupulous(adjective, immoral)
4
vile(adjective, unethical)
3
bad(adjective, unethical)
3
bad to the bone
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APASmart Define. (2015). principled thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/principled/thesaurus/antonyms
ChicagoSmart Define. 2015. "principled thesaurus" https://smartdefine.org/principled/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, principled thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/principled/thesaurus/antonyms>.
MLASmart Define. "principled thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/principled/thesaurus/antonyms>