Verbs based on root *upi-
vъpiti
3sg.prs vъpietъ (je-stem), 2/3sg.aor vъpi (iH-stem)
Leskien class I
ipf aspect
intransitive
prefix variation: vъz- (pf)
ESSJ (1105): probably related to latv. ūpis, onor. úfr ʹowlʹ, the vowel seems to be a part of the root, used as an interjection, but there are also cz./slk. forms with aor/inf ě-stems
SJSExamples in the corpus: vъpiti vъplь vъzupiti
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