Source : Webster's Revised Unabridged Dictionary (1913)

Aby \A*by"\, Abye \A*bye"\, v. t. & i. [imp. & p. p. {Abought}.]
   [AS. [=a]bycgan to pay for; pref. [=a]- (cf. Goth. us-, Ger.
   er-, orig. meaning out) + bycgan to buy. See {Buy}, and cf.
   {Abide}.]
   1. To pay for; to suffer for; to atone for; to make amends
      for; to give satisfaction. [Obs.]

            Lest to thy peril thou aby it dear.   --Shak.

   2. To endure; to abide. [Obs.]

            But nought that wanteth rest can long aby.
                                                  --Spenser.

Source : WordNet®

aby
     v : make amends for; "expiate one's sins" [syn: {expiate}, {abye},
          {atone}]
     [also: {abye}, {abought}]

abye
     v : make amends for; "expiate one's sins" [syn: {expiate}, {aby},
          {atone}]

abye
     See {aby}