ex·pe·di·ent /ɪkˈspidiənt/
 權宜之計,臨時手段(a.)權宜的,方便的,有用的
 Ex·pe·di·ent a.
 1. Hastening or forward; hence, tending to further or promote a proposed object; fit or proper under the circumstances; conducive to self-interest; desirable; advisable; advantageous; -- sometimes contradistinguished from right or principled.
    It is expedient for you that I go away.   --John xvi. 7.
    Nothing but the right can ever be expedient, since that can never be true expediency which would sacrifice a greater good to a less.   --Whately.
 2. Quick; expeditious. [Obs.]
    His marches are expedient to this town.   --Shak.
 Ex·pe·di·ent, n.
 1. That which serves to promote or advance; suitable means to accomplish an end.
 What sure expedient than shall Juno find,
 To calm her fears and ease her boding mind?   --Philips.
 2. Means devised in an exigency; shift.
 Syn: -- Shift; contrivance; resource; substitute.
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 expedient
      adj 1: serving to promote your interest; "was merciful only when
             mercy was expedient" [ant: inexpedient]
      2: appropriate to a purpose; practical; "in the circumstances
         it was expedient to express loyalty"
      n : a means to an end; not necessarily a principled or ethical
          one