Reconstruction:Proto-Slavic/-stъ

Etymology
. May reflect:
 * Fossilized 0-grade of the root, effectively meaning in the state of X. Similar semantic development of the PIE root is found in 🇨🇬 (present tense copula);
 * From, similar to 🇨🇬;
 * From dissimilation of 🇨🇬/ > 🇨🇬 or from 🇨🇬 > 🇨🇬. Compare 🇨🇬.

Cognate with 🇨🇬, (e.g. 🇨🇬, ), 🇨🇬 (e.g. 🇨🇬). Perhaps related to the sta-present in Baltic.

Suffix 2

 * (present stem ) →
 * (present stem ) →