faithless
adjective
[ ˈfeɪθləs ]
• disloyal, especially to a spouse or partner.
• "her faithless lover"
Similar:
unfaithful,
disloyal,
inconstant,
false,
false-hearted,
untrue,
adulterous,
traitorous,
treacherous,
perfidious,
fickle,
flighty,
untrustworthy,
unreliable,
undependable,
deceitful,
deceiving,
two-faced,
Janus-faced,
double-dealing,
double-crossing,
cheating,
two-timing,
back-stabbing,
double-faced,
• without religious faith.
• "they were ungodly and faithless"
Similar:
unbelieving,
non-believing,
irreligious,
without religious faith,
disbelieving,
doubting,
sceptical,
agnostic,
atheistic,
non-theistic,
pagan,
heathen,
nullifidian,