су-

Etymology
. Cognate with 🇨🇬. From either or. Further cognate with 🇨🇬,, 🇨🇬, , 🇨🇬 (the latter three being nominal prefixes), along with 🇨🇬, , 🇨🇬, , 🇨🇬, , 🇨🇬, , , 🇨🇬.

Etymologically identical to the verbal prefix, from 🇨🇬. The difference in development is because of the looser juncture between early Proto-Slavic verbs and preverbs: thus, preverbal *sun was subject to Slavic Auslautgesetze. A similar situation is found in modern German. Not to be confused with, from.

A similar or equivalent prefix appears in a few words in Old Church Slavonic as, with no trace of a nasal vowel, e.g. , with the root of ; compare 🇨🇬. Some linguists believe this to be a distinct suffix, while Vasmer sees (in this case at least) assimilation from earlier, as above.

Prefix

 * 1) com-, con-
 * + nominal form (with o-vocalism, Proto-Slavic -ǫ-) corresponding to (root ) →
 * + nominal form of (root, 🇨🇬) → 🇨🇬 → 🇨🇬 (with change of prefix vowel, influenced by )
 * + (compare, ) +  →
 * + nominal form (with o-vocalism) corresponding to →  (dialectal )
 * + nominal form (with o-vocalism) corresponding to →  (dialectal )
 * + nominal form (with o-vocalism) corresponding to →  (dialectal )
 * + nominal form (with o-vocalism) corresponding to →  (dialectal )

Usage notes

 * Not a productive prefix.