English

Adverb

wherethrough ‎(not comparable)

1. (archaic) Through which.

   There was also a small window, wherethrough a prisoner might conceivably escape.

2. (obsolete) By means of which; whereby.
   • 1485, Sir Thomas Malory, Le Morte d’Arthur, Bk.IX, Ch.xxxviij:

     in hys harte he feryd sore that Sir Trystram sholde get hym such worship in the realme of Logrys wherethorow hymselff shuld nat be able to withstonde hym.

   • 1603, John Florio, translating Michel de Montaigne, Essayes, London: Edward Blount, OCLC 946730821, II.12:

     They perceived her to be capable of diverse passions, and agitated by many languishing and painfull motions, wherethrough she fell into wearinesse and griefe […].