Reconstruction:Proto-Slavic/vъ(n)

Etymology
Either:
 * From, from the zero-grade of.
 * Cognate with 🇨🇬,, 🇨🇬.
 * From, from o-grade of.
 * Cognate with 🇨🇬, 🇨🇬 /, 🇨🇬, 🇨🇬 / , 🇨🇬.

Often assumed to come from the zero-grade. However there are no secure examples of *n̥ > Balto-Slavic *un (other examples like (often considered to be an Iranian borrowing) are all riddled with difficulties and unreliable), and the o-grade  can be posited instead. See also, , , and , , , , ,.

Preposition

 * 1)  in, inside, within (stationary)
 * 2)  in, into, inside (motion to)
 * 3)  at (a moment in time)
 * 4)  in, during (a period of time)

Usage notes
Because of the law of open syllables, the final -n was normally dropped. But when combined with a stem that (originally?) began with a vowel, it was attached to the following word. (Example: *vъn *jejь > 🇨🇬 в нея "in her").

Descendants

 * East Slavic:
 * South Slavic:
 * Serbo-Croatian:
 * Chakavian: ,
 * Kajkavian: ,
 * West Slavic:
 * Pomeranian:
 * Sorbian:
 * Chakavian: ,
 * Kajkavian: ,
 * West Slavic:
 * Pomeranian:
 * Sorbian:
 * Pomeranian:
 * Sorbian:
 * Pomeranian:
 * Sorbian:
 * Pomeranian:
 * Sorbian:
 * Sorbian:
 * Sorbian:
 * Sorbian: