资料来源 : Webster's Revised Unabridged Dictionary (1913)

Extemporize \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.