traitorous
adjective
[ ˈtreɪt(ə)rəs ]
• relating to or characteristic of a traitor; treacherous.
• "when his traitorous actions were discovered, he was imprisoned"
Similar:
treacherous,
disloyal,
treasonous,
back-stabbing,
double-crossing,
double-dealing,
faithless,
unfaithful,
perfidious,
two-faced,
Janus-faced,
false-hearted,
duplicitous,
deceitful,
false,
untrue,
untrustworthy,
unreliable,
undependable,
fickle,
two-timing,