Behest

Part of speech: noun (n.)

1. That which is willed or ordered; a command; a mandate; an injunction. To do his master's high behest. Sir W. Scott.

2. A vow; a promise. [Obs.] The time is come that I should send it her, if I keep the behest that I have made. Paston.

Part of speech: verb (v.)

To vow. [Obs.] Paston.