Adverb
To which; -- used relatively.
To what; to what end; -- used interrogatively.
Source: Webster's dictionaryTis a common proof, That lowliness is young ambitions ladder, Whereto the climber-upward turns his face But when he once attains the upmost round, He then unto the the ladder turns his back, Looks in the clouds, scorning the base degrees By which he did ascend. William Shakespeare
Thou too art a Conqueror and Victor; but of the true sort, namely over the Devil: thou too hast built what will outlast all marble and metal, and be a wonder-bringing City of the Mind, a Temple and Seminary and Prophetic Mount, whereto all kindreds of the Earth will pilgrim. Thomas Carlyle
A lawyer's office is, I'm sure you'll find, Just like a mill, whereto for grinding come A crowd of folk of every sort and kind. Pietro Nelli
Music takes us out of the actual and whispers to us dim secrets that startle our wonder as to who we are, and for what, whence, and whereto. Ralph Waldo Emerson