acid

any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

street name for lysergic acid diethylamide

harsh or corrosive in tone

• “an acerbic tone piercing otherwise flowery prose”
• “a barrage of acid comments”
• “her acrid remarks make her many enemies”
• “bitter words”
• “blistering criticism”
• “caustic jokes about political assassination, talk-show hosts and medical ethics”
• “a sulfurous denunciation”
• “a vitriolic critique”

containing acid

• “an acid taste”