From Proto-Turkic *sīĺč- (“to swell”). Cognate with Turkish şişmek, Bashkir шешеү (şeşew), Tuvan ыжар (ıjar), Shor шиш- (“to swell”), Uzbek shishmoq, etc.
шишүү • (şişüü) (Arabic spelling شئشۉۉ)