Jastrow: סִירָה

סִירָה, סִירָא I f. (b. h. סִיר; סוּר , v. סרי) 1) [degenerate growth,] thorn, thorn-bush. Bekh. 37ᵇ; Shebu. 4ᵇ, a. e. הסול והס׳ a prick or a thorn, v. סוֹל. Ker. III, 8 (15ᵇ) תוחבו בס׳ pins it with a thorn (to a stationary object). Lev. R. s. 26; Y. Peah I, 16ᵃ bot.; Midr. Till. to Ps. VII, a. e., v. עָדָה I. Snh. 49ᵃ בור וס׳ גרמו וכ׳ well and thorn were the cause of Abner’s death (i.e. when David had taken Saul’s pitcher and spear, Abner said that the lads had left them at the well, and when the lap of Saul’s cloak was shown in David’s hand, Abner said, it was caught in a thornbush); a. fr.—Pl. סִירוֹת, סִירָאוֹת. Midr. Till. l. c. Ex. R. s. 30; a. e. —2) refuse, foul matter. — Pl. סִירוֹת. Midr. Till. to Ps. II, beg. מה הים הזה כל סִירוֹתָיו על פיו כך סִירוֹתֵיהֶם וכ׳ as all the refuse of the sea is on its mouth (shore), so the foulness of the wicked is in their mouths; Yalk. Is. 350. Yalk. Num. 771 מה הנהר שוטף את הס׳ וכ׳ as the river carries off the refuse, so does the Day of Atonement &c.