vouch·safe /vaʊʧˈsef, ˈvaʊʧˌ/
  (vt.)允許,給予
  Vouch·safe v. t. [imp. & p. p. Vouchsafed p. pr. & vb. n. Vouchsafing.]
  1. To condescend to grant; to concede; to bestow.
     If ye vouchsafe that it be so.   --Chaucer.
     Shall I vouchsafe your worship a word or two?   --Shak.
     It is not said by the apostle that God vouchsafed to the heathens the means of salvation.   --South.
  2. To receive or accept in condescension.  [Obs.]
  Vouch·safe, v. i. To condescend; to deign; to yield; to descend or stoop.
     Vouchsafe, O Lord, to keep us this day without sin.   --Bk. of Com. Prayer.
  Vouchsafe, illustrious Ormond, to behold
  What power the charms of beauty had of old.   --Dryden.
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  vouchsafe
       v 1: grant in a condescending manner
       2: promise or agree condescendingly, as a special favor