Dastard

Das"tard (?), n. [Prob. from Icel. dæstr exhausted. breathless, p. p. of dæsa to groan, lose one's breath; cf. dasask to become exhausted, and E. daze.] One who meanly shrinks from danger; an arrant coward; a poltroon.

You are all recreants and dashtards, and delight to live in slavery to the nobility.
Shak.

Das"tard, a. Meanly shrinking from danger; cowardly; dastardly. "Their dastard souls." Addison.

Das"tard, v. t. To dastardize. [R.] Dryden.