הכשר

הֶכְשֵׁיר, הֶכְשֵׁרm. (כָּשֵׁר) preparation; fitness, esp. 1) direct cause, responsibility. B. Kam.I, 2 הבתי … כה׳ כל נזקי I am bound to pay such compensation as though I had been the entire cause of the damage. Y. ib. 2a לה׳ נזקין it refers to responsibility for damage, opp. נזקי גופו infliction of bodily injuries; Y.Gitt.V, beg.46c. 2) finishing. Gen. R. s. 14 הֶכְשֵׁירוֹ באור (an earthen or glass vessel) is finished in fire. 3) that which makes a thing legal, that which is ritually fit (v. כָּשֵׁר). Y.Gitt.III, 44d מפסולו את למד הכשירו from what makes a letter of divorce invalid you can learn what makes it valid. Y.Pes.V, 32b top לבור פסולו מתיך הכשירו distinguish the unfit element of it from the fit element. 4) (levitical law) fitness to become unclean (which arises from contact with certain liquids), cause of fitness (הוכשר לקבל טומאה, v. כָּשֵׁר). Ḥull.36b עשאוהו כה׳ מים they declared it (slaughtering, pressing grapes) to be equal in its effect to the fitness for uncleanness which arises from contact with liquids. Ib. 121a ה׳ מים ממקום אחר the liquids which produce the fitness to become unclean must come from without. Ib. ה׳ למה לי why should contact with liquids be necessary at all? Ib. צריךה׳ requires contact with liquids in order to become fit Y.Kil.VII, end, 31a; Sabb.95b ה׳ זרעים (v. Rabb. D. S. a. l.) the requirement that the plants (in the pot) must come in contact with liquids in order to be fit for uncleanness; a. fr.