-ѧ

From Proto-Slavic *-ę.

-ѧ • (-ę) n

1. Denominal nominalizing suffix used to form a neuter noun, usually a diminutive denoting the young of animals.
   • козьлъ (kozĭlŭ, “he-goat”) → козьлѧ (kozĭlę, “kid”)
   • отрокъ (otrokŭ, “child, servant”) → отрочѧ (otročę, “child”)
   • осьлъ (osĭlŭ, “ass”) → осьлѧ (osĭlę, “young ass”)

Lunt affirms that this suffix was “surely productive” in the OCS period, although few words formed with it are attested.

• Halla-aho, Jussi (2006) Problems of Proto-Slavic Historical Nominal Morphology: On the Basis of Old Church Slavic (Slavica Helsingiensia; 26), Helsinki: University of Helsinki
• Lunt, Horace (2001) Old Church Slavonic Grammar, Seventh Revised Edition, Berlin/New York: Mouton de Gruyter, page 75.