Jastrow: תָּרַף

תָּרַף (Taf. of רָפָה), Hif. חִתְרִיף 1) to make soft. Tosef. Shebi. I, 8 לא יקנח … מפני שמַתְרִיפוֹ ed. Zuck. (oth. ed. שמתרין, שמתרן) (in the Sabbatical year) one must not smear resin over a root (of a bulbous plant), because it makes it softer (advances its ripening). —2) to rot, decay; to become weak. B. Bath. 19ᵇ בשהִתְרִיפוּ when the dates are rotten. Y. B. Kam. V, end, 5ᵃ בשהתריפו מחמת אוירו when the animals grew sick from the air in the pit (v. הֶבֶל).