Комментарии:Lee 1958, 119 (Kor.-TM), АПиПЯЯ 291, ТМС 1, 11. The TM form is not borrow < Mong., pace Rozycki 11. *agaɣar (cf. the length in all dialects) < *aɣa-ɣar, with regular dissimilation. The Jpn. form may be attributed here if it originally meant "rainy season" (cf. "rain, thunder" in TM); autumn is not so rainy in present-day Japan, but it must have been different in the original homeland.