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Meaning of infirm

in•firm

Pronunciation: (in-fûrm'), [key]
— adj.
  1. feeble or weak in body or health, esp. because of age; ailing.
  2. unsteadfast, faltering, or irresolute, as persons or the mind; vacillating: infirm of purpose.
  3. not firm, solid, or strong: an infirm support.
  4. unsound or invalid, as an argument or a property title.
—v.t.
  1. to invalidate.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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