Комментарии:SKE 238. Mong. may be < Turk., see Щербак 1997, 198. The genuine reflex may be Mong. *sir- (Khalkha šürge-, Kalm. šürgǝ- 'to rub off', WMong. sirgü-, KW 371; Khalkha širǖn, Kalm. šürǖn, WMong. sireɣün 'rough, shaggy'; WMong. sirbe- 'to sweep') - although the -i- vowel here is not quite clear. The root generally displays some variation between *ši̯ŭ́re and *ši̯ŭ́ru.
