[contracted from thine, or from some other derivative of thou. It is probable that the pronoun was originally thig, thug or thuk, and the adjective thigen. See Thou.]

Thy is the adjective of thou, or a pronominal adjective, signifying of thee, or belonging to thee, like tuus in Latin. It is used in the solemn and grave style.

These are thy works, parent of good.