adv

• (conjunctive, interrogative, archaic) Why, for what reason, because of what.
  "Ah, Romeo, Romeo, wherefore art thou Romeo? / Denie thy Father, and refuſe thy name, / Or if thou wilt not be but ſworne my loue, / And il'e no longer be a Capulet."
• (conjunctive, indicative, archaic or formal) Therefore; thus.
  "For behold, by the power of his word man came upon the face of the earth, which earth was created by the power of his word. Wherefore, if God being able to speak and the world was, and to speak and man was created, O then, why not able to command the earth, or the workmanship of his hands upon the face of it, according to his will and pleasure?"

conj

• (archaic) Because of which.
  "Wherefore, thus ſaith the holy one of Iſrael, Becauſe ye deſpise this word, and truſt in oppreſſion and peruerſeneſſe, and ſtay thereon: Therefore this iniquitie ſhalbe to you as a breach ready to fall, ſwelling out in a high wall, whoſe breaking commeth ſuddenly at an inſtant."