ex·tem·po·rize /ɪkˈstɛmpəˌraɪz/
  (vt.)(vi.)即席演說,即興演奏,當場作成
  Ex·tem·po·rize v. i. [imp. & p. p. Extemporized p. pr. & vb. n. Extemporizing ] To speak extempore; especially, to discourse without special preparation; to make an offhand address.
  Ex·tem·po·rize, v. t. To do, make, or utter extempore or off-hand; to prepare in great haste, under urgent necessity, or with scanty or unsuitable materials; as, to extemporize a dinner, a costume, etc.
     Themistocles . . . was of all men the best able to extemporize the right thing to be done.   --Jowett (Thucyd. ).
     Pitt, of whom it was said that he could extemporize a Queen's speech   --Lord Campbell.
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  extemporize
       v 1: manage in a makeshift way; do with whatever is at hand;
            "after the hurricane destroyed our house, we had to
            improvise for weeks" [syn: improvise]
       2: perform without preparation; "he extemporized a speech at
          the wedding" [syn: improvise, improvize, ad-lib, extemporise]