ex·pe·di·en·cy /-diən(t)si/
  權宜,方便,私利
  Ex·pe·di·ence Ex·pe·di·en·cy, n.
  1. The quality of being expedient or advantageous; fitness or suitableness to effect a purpose intended; adaptedness to self-interest; desirableness; advantage; advisability; -- sometimes contradistinguished from moral rectitude or principle.
     Divine wisdom discovers no expediency in vice.   --Cogan.
     To determine concerning the expedience of action.   --Sharp.
     Much declamation may be heard in the present day against expediency, as if it were not the proper object of a deliberative assembly, and as if it were only pursued by the unprincipled.   --Whately.
  2. Expedition; haste; dispatch. [Obs.]
     Making hither with all due expedience.   --Shak.
  3. An expedition; enterprise; adventure. [Obs.]
     Forwarding this dear expedience.   --Shak.
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  expediency
       n : the quality of being suited to the end in view [syn: expedience]
           [ant: inexpedience, inexpedience]