1566. Blundevil, Horsemanship, IV. xl. (1580), 18 b. To let his meate fall out of his mouth, or at the least to keepe it in his mouth vnchawed.
1600. J. Lane, Tom Tel-troth, 609. Bits vnchawde in her bulke, as in a forge, Kindle the coales whereof foule lust is bred.
1693. Dryden, Persius, v. 8. Why woudst thou these mighty Morsels chuse, OF Words unchawd, and fit to choak the Muse?
So Unchawn ppl. a. (UN-1 8 b.)
1648. Hexham, II. Ongeknauwt, vnchawne.