Adjective mordacious has 2 senses
  1. barbed, biting, nipping, pungent, mordacious - capable of wounding; "a barbed compliment"; "a biting aphorism"; "pungent satire"
    Antonym: unsarcastic (indirect, via sarcastic)
  2. mordacious - biting or given to biting; "they deliberately gave me a skittish and mordacious mount"
    Antonym:
    safe (indirect, via dangerous)
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