Definition for Dastardly:

• treacherously cowardly; " the unprovoked and dastardly attack by Japan on... December 7th"- F. D. Roosevelt

Synonyms for Dastardly:

• adj.

  •cowardly (adjective)
  • sneaking,
  • shrinking,
  • Chicken-hearted,
  • base,
  • mean,
  • pusillanimous,
  • yellow-bellied,
  • timorous,
  • recreant.
  •fearful (adjective)
  • cowardly.
  •rotten (adjective)
  • mean,
  • contemptible,
  • vile,
  • craven,
  • despicable,
  • low,
  • pusillanimous,
  • cowardly,
  • base.

• n.

  •
  • pitiless,
  • unkind,
  • evil,
  • uncharitable,
  • hateful,
  • inhuman,
  • monstrous,
  • hard,
  • awful,
  • cruel.
  •
  • unmanly,
  • craven,
  • gutless,
  • pusillanimous,
  • chicken,
  • fear,
  • yellow-bellied,
  • faint-hearted,
  • yellow,
  • chickenhearted,
  • lily-livered.
  •dastardly (noun)
  • dastard,
  • coward,
  • cowardly,
  • fearful.

• Other synonyms:

  •
  • yellow-bellied,
  • faint-hearted,
  • lily-livered,
  • gutless,
  • chickenhearted,
  • pusillanimous.
  •
  • unmanly,
  • craven.
  •
  • yellow.
  •Other relevant words:
  • feeble,
  • dirtily,
  • white-livered,
  • basilisk,
  • scoundrelly,
  • wicked,
  • nefarious,
  • fear,
  • unprincipled,
  • Vitelline,
  • unspeakable,
  • sneaky,
  • sordidly,
  • servile,
  • soullessly,
  • malicious,
  • immoral,
  • furtively,
  • rogue,
  • inhuman,
  • knavish,
  • perfidious,
  • poorly,
  • imp,
  • timid,
  • hard,
  • spiritless,
  • frightful,
  • gutless,
  • stinking,
  • degraded,
  • insidious,
  • namby-pamby,
  • scurvy,
  • sneakily,
  • squealer,
  • urchin,
  • monstrous,
  • devious,
  • trepid,
  • averagely,
  • shameful,
  • diabolical,
  • set free,
  • let go,
  • worm,
  • awful,
  • afraid,
  • yellow-bellied,
  • scary,
  • abject,
  • menial,
  • scoundrel,
  • ungallant,
  • shellfish,
  • serpent,
  • trivially,
  • pettily,
  • surreptitiously,
  • hateful,
  • cruel,
  • foully,
  • abominable,
  • base,
  • rapscallion,
  • depraved,
  • bird,
  • reptile,
  • infamous,
  • pitiably,
  • squeamish,
  • mean,
  • vile,
  • fearfully,
  • dishonest,
  • Smally,
  • unconscionable,
  • spineless,
  • recreant,
  • frightened,
  • scamp,
  • villainously,
  • poltroon,
  • pusillanimous,
  • blackguardly,
  • outrageous,
  • wretch,
  • recreantly,
  • Milk-livered,
  • shabbily,
  • treacherous,
  • mammal,
  • villainous,
  • filthily,
  • vulgar,
  • sordid,
  • monkey,
  • hellish,
  • impassively,
  • wimpish,
  • craven,
  • uncharitable,
  • nasty,
  • chicken,
  • yellow,
  • despicable,
  • contemptibly,
  • Fiendly,
  • unmanly,
  • cravenly,
  • disgraceful,
  • chickenhearted,
  • sneak,
  • dunghill,
  • reprehensible,
  • subordinately,
  • pitiless,
  • felonious,
  • unkind,
  • contemptible,
  • shrinking,
  • deceitful,
  • creeper,
  • slightly,
  • unscrupulous,
  • atrocious,
  • caitiff,
  • meanly,
  • rascal,
  • frivolously,
  • ignoble,
  • sneakingly,
  • unwarlike,
  • iniquitous,
  • Lousily,
  • bad,
  • dishonorable,
  • lily-livered,
  • vilely,
  • nastily,
  • evil,
  • flagitious,
  • vicious,
  • criminal,
  • faint-hearted,
  • black,
  • Chicken-hearted,
  • viper,
  • low,
  • chicken-livered,
  • unheroic,
  • infernal,
  • crawler,
  • scared,
  • sneaking,
  • villain,
  • timorous,
  • foul.

Antonyms for Dastardly:

• adj.

  • rotten
    respectable, honorable, worthy.
  • Other antonyms:
    nervy, daring, intrepid, fearless, lionhearted, audacious, cheeky, determined, plucky, hardy, brazen, spirited, spunky, heroic, resolute.

• Other antonyms:

  • n. t.
    brazen, cheeky, daring, determined, hardy, heroic, honorable, honourable, noble, praiseworthy, resolute, respectable, spirited, spunky.