קוֹשִׁי, protracted travailing (v. Gen. XXXV, 17). Sifra Thazr. ch. II; Nidd. 38ᵇ, opp. שופי. Ib. IV, 6. Yeb. 83ᵃ; a. fr.
קוֹשִׁי, hard effort; בק׳by an effort, reluctantly. Sabb. 12ᵇ בק׳ התירו לנחם וכ׳ it was with reluctance that they allowed mourners to be comforted and the sick to be visited on the Sabbath (because it disturbs the Sabbath joy).