Lexicon of Old Church Slavonic Verbs

Verbs based on root *sup-

u-sъnǫti
3sg.prs usъnetъ (ne-stem), 2/3sg.aor usъpe (e-stem)
Leskien class II
pf aspect
intransitive
prefix variation: za-, prědъu-, u- (pf)

LIV (612): nasal infix replaced a je-present, attested in "r.-ksl." u-sple-
maybe originally an a-/je-verb (PSl. 3sg.aor *supāst, prs *supjeti ?), later distinguishing inchoative (ʹfalling asleepʹ) and stative present?

SJS

u-sypati
3sg.prs usypaetъ (aje-stem), 2/3sg.aor usypa (a-stem)
Leskien class III
ipf aspect
intransitive
prefix variation: u- (ipf)

Mikl. also gives a later (17th c.) ipf v-a-/aje-verbs sъpavati

SJS

sъpati
3sg.prs sъpitъ (i-stem), 2/3sg.aor sъpa (a-stem)
Leskien class IV
ipf aspect
intransitive
prefix variation: za-, iz-, na-, po-, pro-, prě-, sъpo-, sъ-, u- (pf)

LIV (613): likely based on an old perfect stem (1sg *[se]-sup-h₂e), but attested ptcp are only with -ę (e.g. sъpęštemъ in Mt 28:13, unlike gorǫšte)
ESSJ (930) also mentions older explanations, seeing i-presents as analogies

SJS


Examples in the corpus: pospa spavati spja sъnuvam usъnǫti uspati zaspivam zaspja

full lexicon