Jastrow: כְּתִישָׁה

כְּתִישָׁה f. (כָּתַשׁ) crushing, pounding. Sabb. 74ᵃ עני … בלא כ׳ a poor man eats his bread without pounding the grain before grinding (to remove the husks), v. כָּתַשׁ. Bets. 7ᵇ והא קא עביד כ׳ but (by crushing the clods of earth) does he not do the (forbidden) act of pounding? Cant. R. to I, 3 מה השמן … אלא ע"י כ׳ וכ׳ as the oil cannot be improved except by pounding (the olives), so can Israel only by suffering; Men. 53ᵇ מה זית … ע"י כ׳ Ms. M. (ed. כתית, corr. acc.) as the olive gives forth its oil only through pounding &c.; Yalk. Jer. 289.