Comments:Martin 249, АПиПЯЯ 111, 277. An Eastern isogloss (but cf. perhaps Mong. abija(n) (L 4), Khalkha av́a, Bur. ab́a 'sound' ( < *ibaja ?); on a possible Turkic parallel see under *ŏ́t`è); seems reliable, despite a tonal discrepancy between Kor. and Jpn.