faithlessly
  (ad.)不忠實地;不貞地
  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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  faithlessly
       adv : in a disloyal and faithless manner; "he behaved
             treacherously"; "his wife played him false" [syn: traitorously,
              treacherously, treasonably, false]