Proto-Altaic: *si̯ŏ́su
Meaning: to scoop; to wash
Russian meaning: черпать; мыть
Comments: The Kor. reflex is irregular (we should expect *h-), perhaps due to the influence of the second -s-. It is alternatively possible to reconstruct *sisu with an irregular labialized reflex in PT (instead of *sɨs-), on analogy with *sub < *sɨb 'water'. One should also keep in mind that Middle Korean has actually two forms (sìs- 'wash' and sɨ́s- 'cleanse, wipe off') that have merged in modern s:it-, so we may in fact be dealing with a confusion of two original roots.
