18
untrustworthy(adjective, open, honest, false, doubtful)
14
dishonest(adjective, good, open, honest, false)
12
shameful
11
hypocritical
7
disloyal(adjective, loyal, unfaithful)
7
unreliable(adjective, clear, strong, false, true)
7
outrageous
6
ambidextrous
6
deceitful(adjective, dishonest, insincere)
6
not good
6
treacherous
4
undependable(adjective, false, doubtful, responsible, irresponsible)
4
devious
4
irresponsible(adjective, false, careless, doubtful, reckless)
4
sinful
4
untruthful(adjective, open, false, doubtful, truthful)
3
lying(adjective, false, doubtful)
2
unfaithful(adjective, faithful, disloyal, adulterous)
2
ill-gotten
2
unsafe(strong, secure)
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APASmart Define. (2015). trustworthy thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/trustworthy/thesaurus/antonyms
ChicagoSmart Define. 2015. "trustworthy thesaurus" https://smartdefine.org/trustworthy/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2015, trustworthy thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/trustworthy/thesaurus/antonyms>.
MLASmart Define. "trustworthy thesaurus" 24 October 2015. Web. 27 September 2026. <https://smartdefine.org/trustworthy/thesaurus/antonyms>