Thou

Part of speech: verb (v.)

To address as thou, esp. to do so in order to treat with insolent familiarity or contempt. If thou thouest him some thrice, it shall not be amiss. Shak.

Part of speech: verb (v.)

To use the words thou and thee in discourse after the manner of the Friends. [R.]

Part of speech: pronoun (pron.)

The second personal pronoun, in the singular number, denoting the person addressed; thyself; the pronoun which is used in addressing persons in the solemn or poetical style. Art thou he that should come Matt. xi. 3.