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KEY: Infirm.

SYN: Weak, decrepit, lame, {[inforcible]?}, unsound, failing, irresolute, feeble, enfeebled.

ANT: Firm, strong, sure, cogent, forcible, sound.

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KEY: Infirmity.

SYN: Weakness, decrepitude, unsoundness, [See INFIRM].

ANT: Strength, vigor, healthfulness, soundness.

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KEY: Infix, [See FIX].