What is the meaning of Ist?

ISO 639-3 language code for Istriot.

A practitioner or supporter of an ism.

third-person singular present indicative of zèinan

genitals

buttocks

upper part

top

Salaca form of istõ (“to sit”)

third-person singular present indicative of sīn / wësen

third-person singular present indicative of wësan

romanization of ᛁᛊᛏ

third-person singular present of sein

romanization of 𐌹𐍃𐍄

hush, shh

Source: wiktionary.org