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The Collaborative International Dictionary
Dastardize

Dastardize \Das"tard*ize\, v. t. [imp. & p. p. Dastardized; p. pr. & vb. n. Dastardizing.] To make cowardly; to intimidate; to dispirit; as, to dastardize my courage.
--Dryden.

Wiktionary
dastardize

vb. To make cowardly; to intimidate or dispirit.