untrustworthy
adjective
[ ʌnˈtrʌs(t)wəːði ]
• not able to be relied on as honest or truthful.
• "Thomas considered her to be devious and untrustworthy"
Similar:
dishonest,
deceitful,
not to be trusted,
double-dealing,
treacherous,
traitorous,
two-faced,
Janus-faced,
unfaithful,
duplicitous,
dishonourable,
unprincipled,
unscrupulous,
corrupt,
shady,
shifty,
underhand,
unreliable,
undependable,
capricious,
fickle,
slippery,
iffy,
dodgy,
shonky,