Verbs based on root *by-
iz-bavljati
3sg.prs izbavljaetъ (i-aje-stem), 2/3sg.aor izbavlja (i-a-stem)
Leskien class III
ipf aspect
ambitransitive
arguments: acc/sę, otъ + gen
prefix variation: za-, iz-, pri-, pro-, u- (ipf)
SJS
byvati
3sg.prs byvaetъ (v-aje-stem), 2/3sg.aor byva (v-a-stem)
Leskien class III
ipf aspect
intransitive
prefix variation: za-, iz-, pri-, prido-, prě-, sъ-, sъprě-, u- (ipf)
SJS
iz-baviti
3sg.prs izbavitъ (i-stem), 2/3sg.aor izbavi (i-stem)
Leskien class IV
pf aspect
transitive
arguments: acc/sę, otъ + gen
prefix variation: do-, za-, iz-, poza-, pri-, pro- (pf)
unprefixed baviti ʹlinger, amuseʹ (ipf) is found in all Slavic branches
the meaning of OCS izbaviti may be like ʹmake to be outside of (sin)ʹ
byti (1)
3sg.prs estъ (C-stem), 2/3sg.aor estъ ? (C-stem)
Leskien class V
ipf/pf aspect
intransitive
LIV (242): *h₁es-
old opt si (< *h₁s-ih₁-) used in Supr. as emphatic particle (e.g. kъde si nyně jesi ʹwherever you are nowʹ)
byti (2)
3sg.prs bǫdetъ (e-stem), 2/3sg.aor bystъ (y-stem)
Leskien class I
pf aspect
intransitive
prefix variation: za-, iz-, izne-, otъ-, po-, pri-, prido-, prě-, prěiz-, sъ-, u- (pf)
LIV (98): *bʰuh₂-, origin of prs stem "völlig unklar"
ESSJ (74): a nasal prs stem with a *dʰ-suffix (as in idetъ, Miklosich, resulting in a form similar to lat. gerundive suffix -bundus)
alternatively Machek explains it as a nasal prs of *bud- ʹwakeʹ (as lit. bundù ʹI am awakeʹ)
byti (3)
3sg.prs bi (i-stem), 2/3sg.aor bě (ě-stem)
Leskien class IV
ipf aspect
intransitive
LIV (242): old impf *e-h₁és- > *bʰ(uh₂)-e-h₁és- (added suppletive root or suffixed impf auxiliary?) > 3sg.aor *bēˀs-t > bě, prs *bē(s)-h₁ié- (*s left off, perceived as an aorist marker?) > bi
Examples in the corpus: bivam byti bъda izbavja izbavjam izbavlenie izbyti prebivam prebivanie prěbyvati prebъda pribyti probaviti sъbyti sъprebivanie zabavja zabavjam zabyti zabyvati
full lexicon