אָרַע (√רע, v. רעע) to strike against. Nif. נֶאֱרַע to come in contact with (cmp. זווג), to happen, befall (gen. of evil occurrences). Ber. IV, 2 שלא תֵּאָרַע וכ׳ (Bab. ed. 28ᵇ שלא יֵאָרַע דבר וכ׳) that no (religious) offence may happen through me (by an erroneous decision &c.). Yoma I, 1 שׁמא יארע בו פסול lest something may occur to him to unfit him for services. Esth. R. to II, 7 שיארע על ישראל (read שיארע לישר׳) will happen to Israel; a. fr.
    Pi. - אֵירַע, אִירַע to strike, befall; (neut. v.) to occur. Y. Kidd. I, 58ᵈ top ולא א׳ מעשה no accident (illegal act) occurred. Gen. R. s. 84 כל מה שאירע לזה וכ׳ whatever befell the one, befell also the other; a. fr.—M. Kat. II, 1 אֵירְעוֹ אבל (Ms. M. אירע בו) mourning in the family befell him; a. e.—Y. Shek. V, 48ᵈ bot. כך וכך אירע; Y. Dem. I, 22ᵃ אירעון … (read אירעוֹ) so and so it happened to him. Part. Pu. מְאוֹרָע q. v.
    Hithpa. - הִתְאָרֵעַ to be added to, to join. Y. Sot. I, 17ᵃ אחת מִתְאַרְעָה לאחת וכ׳ one (sin) is added to the other, until the account is full; Num. R. s. 9.