ANT: Heart, centre, nucleus.
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KEY: Precious.
SYN: Dear, valuable, costly, cherished, treasured, beloved, estimable, of great value.
ANT: Cheap, valueless, worthless, unvalued, disesteemed, unappreciated, vile.
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KEY: Precipice.
SYN: Cliff, crag, steep descent, headlong, steep, [See ABYSS].
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KEY: Precipitate, [See RASH].