עָכַר (b. h.) to stir up, disturb; to trouble, make turbid; to sadden. Sot. 5ᵃ כל אדם … עוֹכַרְתּוֹ if a man has swelling of wind (haughtiness) in him, the slightest breeze will trouble him (the slightest adversity will upset him); מה ים … עוכרתו וכ׳ if the sea … is stirred up by the slightest breeze &c. Y. Keth. I, 25ᵇ bot. לעוֹכֵר את העין וכ׳ (not לעובר) like one troubling the eye, which becomes clear again. Ber. 25ᵇ עוֹכְרָן ברגלו he must stir them up with his foot. Gen. R. s. 80, end (ref. to עכרתם, Gen. XXXIV, 30) צלולה היתה החבית ועֲכַרְתֶּם אותה the wine in the cask was clear, and you have troubled it; Yalk. ib. 135 ועֲכַרְתּוּהָ. Nidd. 20ᵃ צללו חוזר ועוכרן if the mixture became clear (the earth settled), he must stir it again; a. fr.—Part. pass. עָכוּר; f. עֲכוּרָה; pl. עֲכוּרִים, עֲכוּרִין; עֲכוּרוֹת. Ib. אין … צלולין אלא ע׳ you must not examine the mixture when it is clear, but when it is turbid; Tosef. ib. III, 11. Gen. R. l. c. ע׳ היתה … וצללנו אותה the wine was turbid, and we cleared it (we redeemed our honor). Snh. 44ᵇ; Lev. R. s. 9 (ref. to Josh. VII, 25) היום הזה אתה ע׳ ואי אתה ע׳ וכ׳ thou art troubled (punished) this day, but thou shalt not be troubled in the hereafter. Sifré Deut. 48 שתה ממים של בוראך … מים ע׳ וכ׳ drink of the water of thy Creator’s well, and drink not muddy water, nor be attracted by the words of the heretics; Yalk. Prov. 937; a. fr.—Ex. R. s. 22 (ref. to Job XVI, 17) וכי יש תפלה ע׳ is there also a turbid prayer? Ib. מנין … שתפלתו ע׳ where is it intimated that the prayer of him in whose hand is robbery, is turbid (rejected)?
Nif. - נֶעְכָּר to be stirred up; to become turbid, dreggy, foul. Nidd. 9ᵃ דם נ׳ ונעשה חלב the blood (of a pregnant animal) is disturbed (decomposed), and turns into milk. Y. Sot. IV, 19ᶜ bot. אין החלב נ׳ וכ׳ the milk (of a nursing woman) becomes turbid only after three months (after conception). Y. Nidd. II, end, 50ᵇ יצללו ולא יֵעָכְרוּ the water mixed with earth must settle and not be stirred up again; a. fr.—Men. IX, 5 (90ᵃ) הלח נ׳ היבש אינו נ׳ (Bab. ed. נעקר; Ms. M. נעבר, corr. acc.; v. Rabb. D. S. a. l. note) liquid emptied from a large measure into a smaller one is stirred up (and what remains in the large measure partakes of the sacred character of the liquid in the smaller, sacred vessels), whereas dry objects are not stirred up.