כָּסַס 1) to cut, grind, chew, nibble. Tosef. Ber. IV, 6 הכּוֹסֵס חטים he who chews wheat grains; Ber. 37ᵃ; a. fr.—Num. R. s. 11 (ref. to אש אכלת, Ex. XXIV, 17) … שבע היו כוֹסְסוֹת זו בזו seven partitions (strata) of fire were eating into one another; Pesik. Haḥod. p. 45ᵃ; Pesik. R. s. 15 בוססות (corr. acc.); v. טָכַס. —2) (b. h.) to make incisions, to mark, count. Mekh. Bo. s. 3; Pes. 61ᵃ; Y. ib. V, 32ᵃ bot., v. נָכַס.
Pilp. - כִּסְכֵּס to chew &c. Tanḥ. Vayigg. 3 מְכַסְכֵּס בשיניו cut (the bronze peas) with his teeth.—V. סִכְסֵךְ II.
Nithpa. - נִתְכַּסְכֵּס, נִיכַּ׳ to be gnawed at (by fire), be charred. Y. Bets. IV, 62ᶜ bot. בשביל שלא תִכַּסְכֵּס (prob. to be read תתכ׳) that it (the log) may not catch fire.