Verbs based on root *tvrd-
u-tvrьždati
3sg.prs utvrьždaetъ (aje-stem), 2/3sg.aor utvrьžda (a-stem)
Leskien class III
ipf aspect
transitive
arguments: acc/sę
prefix variation: po-, sъ-, u- (ipf)
SJS
tvrьděti
3sg.prs tvrьděetъ (ěje-stem), 2/3sg.aor tvrьdě (ě-stem)
Leskien class III
(ipf) aspect
intransitive
Mikl. only (18th c.), but a derived abstract noun tvrьdělь is attested in Supr. (SJS - link)
po-tvrьždevati
3sg.prs potvrьžduetъ (uje-stem), 2/3sg.aor po-tvrьždeva (ova-stem)
Leskien class III
(ipf) aspect
ambitransitive
prefix variation: po-, u- (ipf)
Mikl. only (14th c.)
tvrьditi
3sg.prs tvrьditъ (i-stem), 2/3sg.aor tvrьdi (i-stem)
Leskien class IV
pf aspect
transitive
arguments: acc/sę
prefix variation: za-, sъ-, u- (pf)
ESSJ (1001): denominal of tvrьdъ
SJSExamples in the corpus: tvъrd tvrьdь tvъrdja utvъrdja utvrьždati utvrьždenie zatvъrdja
full lexicon