unfaithful

1. Not true to duty or obligation or promises (synset 300962920)
   "an unfaithful lover"
   also:

   • inconstant - likely to change frequently often without apparent or cogent reason; variable
   • untrustworthy, untrusty - not worthy of trust or belief
   tells us about: faithfulness, fidelity - the quality of being faithful
   similar to:

   • apostate - not faithful to religion or party or cause
   • perfidious, punic, treacherous - tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans
   • untrue - not true to an obligation or trust
2. Having sexual relations with someone other than your husband or wife, or your boyfriend or girlfriend (synset 300964160)
   "her husband was unfaithful"
   similar to: adulterous, cheating, two-timing - not faithful to a spouse or lover
3. Having the character of, or characteristic of, a traitor (synset 300966128)
   "the faithless Benedict Arnold"; "a lying traitorous insurrectionist"
   similar to: disloyal - deserting your allegiance or duty to leader or cause or principle
   same as: faithless, traitorous, treasonable, treasonous
4. Not trustworthy (synset 300024180)
   "an unfaithful reproduction"
   similar to: inaccurate - not accurate

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