6
precarious(adjective, unreliable, insecure, treacherous, incalculable)
6
slippery(adjective, false, dishonest, deceitful, unreliable)
6
unsound(adjective, uncertain, unstable, feeble, unsettled)
5
fitful(adjective, unstable, unsettled, variable)
5
hesitant(adjective, uncertain, nervous, unstable, feeble)
5
indefinite(adjective, vague, unpredictable, unreliable, unknown)
5
infirm(adjective, uncertain, feeble, shaky, hesitant)
5
skittish(adjective, nervous, unstable, unsettled, variable)
5
spineless(adjective, uncertain, nervous, unstable, hesitant)
5
trick(adjective, strong, unpredictable, unreliable, variable)
5
trustless(adjective, uncertain, dishonest, doubtful, deceitful)
5
unsettled(adjective, uncertain, unstable, irregular, vague)
4
ambiguous(adjective, vague, unknown, general, unclear)
4
careless(adjective, foolish, thoughtless, unpredictable, unreliable)
4
changeful(adjective, unstable, irregular, unsettled, unpredictable)
4
disloyal(adjective, false, dishonest, deceitful, unreliable)
4
doubtful(adjective, uncertain, nervous, vague, dubious)
4
false(adjective, dishonest, deceitful, unpredictable, unreliable)
4
feckless(adjective, careless, immoral, thoughtless, reckless)
4
iffy(adjective, uncertain, nervous, doubtful, dubious)
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APASmart Define. (2016). undependable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/undependable/thesaurus/synonyms
ChicagoSmart Define. 2016. "undependable thesaurus" https://smartdefine.org/undependable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, undependable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/undependable/thesaurus/synonyms>.
MLASmart Define. "undependable thesaurus" 4 March 2016. Web. 22 September 2026. <https://smartdefine.org/undependable/thesaurus/synonyms>