ist

ist c'est esse sein

https://en.wiktionary.org/wiki/Reconstruction:Proto-Indo-European/h%E2%82%81es-

ዒጸ ‘īša, “to live” 𓅹

Ⰵ Jestu Jestu Є, Е, Э, Ё /ɛ/ Jestъ Yest is/exists Possibly Samaritan īy ࠄ or Greek sampi ϡ[30]
Ⰹ, Ⰺ I, Izhe Izhe Ι, Ї /i/, /j/ Iže Izhe which is/the <?> upsilon Y[35] or iota ϊ[30]

𒊺𒌅 še-tu √set,stay,steh…
𒊺𒌅 leave remaining ⇔ atstāt
⇔
𒊺𒌅 še-tu •h₁s-tó ἐτός
𒊺𒌅 to be, c'est, seid, seist, exist …