Etymology
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dastardly (adj.)

1560s, "showing despicable cowardice," originally "dull," from Middle English dastard + -ly (1). Related: Dastardliness (1550s).

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Definitions of dastardly

dastardly (adj.)
despicably cowardly; "the unprovoked and dastardly attack by Japan on...December 7th"- F.D. Roosevelt;
Synonyms: dastard
From wordnet.princeton.edu

Dictionary entries near dastardly

dashboard

dasher

dashiki

dashing

dastard

dastardly

dat

data

datable

date

dated