1474, from M.Fr. debilite, from L. debilitatem (nom. debilitas), from debilis "weak," from de- "from, away" + -bilis "strength," from PIE base *bel- (see Bolshevik).
Main Entry: de·bil·i·ty Pronunciation: di-'bil-&t-E Function: noun Inflected Form: plural-ties : the quality orstate of being weak, feeble, or infirm; especially: physical weakness