pro- 前綴
 前,在前,原


 Pro-  A prefix signifying before, in front, forth, for, in behalf of, in place of, according to; as, propose, to place before; proceed, to go before or forward; project, to throw forward; prologue, part spoken before (the main piece); propel, prognathous; provide, to look out for; pronoun, a word instead of a noun; proconsul, a person acting in place of a consul; proportion, arrangement according to parts.

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 pro
      adj : in favor of (an action or proposal etc.); "a pro vote" [ant:
             anti]
      n 1: an athlete who plays for pay [syn: professional] [ant: amateur]
      2: an argument in favor of a proposal [ant: con]
      adv : on the affirmative side [ant: con]