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Synonyms of deadly in English:


  • 1 certain mixtures of drugs can be deadly a deadly disease
    [Antonyms] harmless, beneficial
  • 2 the two men rapidly became deadly enemies
    mortal, irreconcilable, implacable, remorseless, relentless, unrelenting, unappeasable, unforgiving, merciless, pitiless;
    bitter, hostile, antagonistic, murderous, fierce, grim, savage
    informal at each other's throats
  • 3 I noted their deadly seriousness
    intense, great, marked, extreme, excessive, immoderate, inordinate
    [Antonyms] mild
  • 4 he was deadly pale and too weak to speak
    deathly, deathlike, ashen, ghostly, white, pallid, wan, pale, ghastly
  • 5 his aim is deadly
    unerring, unfailing, impeccable, perfect, flawless, faultless, assured, sure, true, precise, accurate, correct, exact, direct, on target, on the mark;
    British  inch-perfect
    British informal spot on, bang on
    vulgar slang shit hot
    [Antonyms] poor, inaccurate
  • 6 informal life in a small village can be deadly See boring
  • adverb

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  • her voice was deadly calm
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