wherethrough

Etymology
From, compare.

Adverb

 * 1)  Through which.
 * There was also a small window, wherethrough a prisoner might conceivably escape.
 * 1)  By means of which; whereby.
 * 2) * 1874, Ernest Myers (transl.), The Extant Odes of Pindar, translated into English, Olympian Ode V, page 16.
 * the river Oanis, and the lake of his native land, and the sacred channels wherethrough doth Hipparis give water to the people,
 * the river Oanis, and the lake of his native land, and the sacred channels wherethrough doth Hipparis give water to the people,