כּוּתַּח, Keth. 60ᵇ; Erub. 62ᵇ אפי׳ ביעתא בכ׳ וכ׳ even as plain a case as the question about an egg that fell into k., a student must not decide in the presence of his teacher. Kerith. 6ᵃ מכ׳ דרמי כיפי than a k. which is hard enough to break rocks; Hor. 12ᵃ (Ms. M. כמכא, v. Rabb. D. S. a. l. note). Erub. 65ᵃ קריב לי כ׳ (Ar. כּוּתָּא) hand me the k. Sabb. 145ᵇ רייק מכ׳ דבבלאי (Ar. מכותא) spat out when thinking of the k. of the Babylonians.