-Characterized by underhandedness or treachery.
-Very mean and tricky.
From 1560s, from Middle English "dastard" + -ly. Dastard = "one who is lazy or dull;" an English formation on a French model, probably from *dast, "dazed," past participle of dasen "to daze" + deprecatory suffix -ard. Meaning "one who shirks from danger" is late 15c.
USED IN A SENTENCE:
“The budget cuts amounted to nothing less than a dastardly attack on senior citizens, veterans and children of poor families.”
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