DICT.TW Dictionary Taiwan

 faithlessness
 無信;不貞

 Faith·less, a.
 1. Not believing; not giving credit.
    Be not faithless, but believing.   --John xx. 27.
 2. Not believing on God or religion; specifically, not believing in the Christian religion.
 3. Not observant of promises or covenants.
 4. Not true to allegiance, duty, or vows; perfidious; trecherous; disloyal; not of true fidelity; inconstant, as a husband or a wife.
    A most unnatural and faithless service.   --Shak.
 5. Serving to disappoint or deceive; delusive; unsatisfying. “Yonder faithless phantom.”
 -- Faith*less*ly, adv.Faith*less*ness, n.
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 faithlessness
      n : unfaithfulness by virtue of being unreliable or treacherous
          [syn: falseness, fickleness, inconstancy]