אוֹנְקוֹס m. (ὄγκος) 1) bulk, pile; (in philosophy) a primitive body. Tanḥ. T’rum. 11 א׳ של מים the body of water; א׳ של אש (some ed. אונקנוס). 2) trouble, difficulty, painstaking. Gen. R. s. 12 (ref. to Neh. IX, 6 sq.) כל הא׳ הזה וכ׳ (ed. אונקים, corr. acc.) what is all this painstaking (creating the universe &c.) for? Ans. Because ‘thou art the Lord who hast chosen Abraham’ i.e. for the sake of establishing religion on earth; cmp. Midr. Till. to Ps. CIV, 18.