Synonyms of dastardly in English:

dastardly

adjective

  • 1 their dastardly plan to kidnap Hayes
    wicked, evil, heinous, villainous, diabolical, fiendish, barbarous, cruel, black, dark, rotten, vile, monstrous, abominable, despicable, degenerate, sordid; bad, base, mean, low, cowardly, dishonorable, dishonest, unscrupulous, unprincipled
    informal lowdown, dirty, shady, sleazy, crooked
    beastly
    [Antonyms] noble
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