יֵאוּשׁ, (יָאַשׁ) despairing of recovering a lost object, resignation. B. Kam. 66ᵃ י׳ אינו קונה the owner’s resignation gives the robber no right of possession (and he must restore the object itself, not its equivalent). Ib.ᵇ ואי ס"ד י׳ קנה וכ׳ and if we should assume that resignation gives a right of possession, how could the robber say, Here is thy property before thee (since in the meantime it has become valueless)?—B. Mets. 21ᵇ top י׳ שלא מדעת unconscious resignation, i.e. a thing which, if missed, is usually given up, but which has as yet not been missed. Ib. הוי י׳ is considered as given up. Y. B. Kam. IV, end, 4ᶜ י׳ טעות a resignation under a false presumption; a. fr.