ANT: Angel, dove.
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KEY: Shrewd.
SYN: Sagacious, penetrating, astute, discriminating, intelligent, discerning, acute.
ANT: Stolid, undiscerning, unsagacious, stupid, dull.
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KEY: Shrill.
SYN: Sharp, piercing, acute, high pitched.
ANT: Low, deep, base, hollow, murmuring, rumbling.
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