Synonyms of dastardly in English:

dastardly


See definition of dastardly

adjective

1‘a dastardly plan was hatched to kidnap him’

SYNONYMS
wicked, evil, iniquitous, heinous, villainous, diabolical, diabolic, fiendish, vicious, murderous, barbarous, cruel, black, dark, rotten, nefarious, vile, foul, monstrous, shocking, outrageous, atrocious, abominable, reprehensible, despicable, execrable, corrupt, degenerate, reprobate, sordid, depraved, dissolute, bad, base, mean, low, dishonourable, dishonest, unscrupulous, unprincipled, underhand, roguish
informal crooked, low-down, stinking, dirty, shady, rascally, scoundrelly
British informal beastly, not cricket
malfeasant
rare egregious, flagitious
ANTONYMS

noble, praiseworthy