Unto

Definitions:

To now used only in formal or Scriptural language.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (preposition) (prep.) (preposition)
A formal or poetic word for to.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (preposition) (prep.) (preposition)
To.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (preposition) (prep.) (preposition)

Usage examples:

To- morrow is my wedding day; Dear master, bless me that the way Of life be smooth, not bitter unto me.
- Among the Millet and Other Poems by Archibald Lampman
And the king said unto her, " Be not afraid, for what sawest thou?"
- History Of Egypt, Chaldæa, Syria, Babylonia, and Assyria, Volume 6 (of 12) by G. Maspero
But there were some who knew, and turned to him For help; and unto all who asked, he gave.
- The Poems of Henry Van Dyke by Henry Van Dyke