Jastrow: תִּירוֹשׁ

תִּירוֹשׁ m. (b. h.; ירש Ges.; cmp., however, רָשַׁשׁ) juice, must, wine. Tosef. Ned. IV, 3 הנודר מן הת׳ … ומותר ביין he that vows abstinence from tirosh is forbidden all kinds of sweet juice, but is permitted (fermented) wine; Y. ib. VII, 40ᵇ bot. כמאן דאמר … התורה קראת אותו ת׳ תִּירוֹשְׁךָ זה היין this is according to him who says, that in vows we follow the ordinary usage, but according to him who says that we must be guided by Biblical usage, the Bible calls it (wine) tirosh; ‘thy tirosh’ (Deut. XI, 14) means wine; (quot. from) Sifré Deut. 42. Ib. תרושך מלא (read תיר׳) ‘thy wine’, that means in abundance. Pesik. ‘Asser, p. 100ᵃ (ref. to Deut. XIV, 22, a. Hos. II, 11) אם זכיתם תירושך ואם לאו תִּירוֹשִׁי if you do good, it is thb must, if not, it is my must; Yalk. Deut. 897; a. e.