sweostor

Part of speech: noun
Gender: feminine
Stem: -r-
sister (also sweoster, swester, swustor, swustur, swyster, swister)
Etymology
[Mod E SISTERProt-Germ *swester; Goth swistar; O Fris swester, suster, sister; O Sax swestar; Dt zuster; OHG swester (Mod G Schwester); Icel systir ← Indo-Europ *suesor-; Sanskr svásar-; Avest xvaŋhar-; Lat soror; O Ir siur; O Prus swestro; Lith sesuō; O Slav сестра (Russ сестра)]
Paradigm

1.2.2. -r- stem nouns (kinship terms)

nouns, -r- stem masculine gender
bróðor
(brother)
singular plural
nominative bróðor bróðor, bróðru
genitive bróðor bróðra
dative (instrumental) bréðer bróðrum
accusative bróðor bróðor, bróðru

nouns, -r- stem feminine gender
sweostor
(sister)
singular plural
nominative sweostor sweostor
genitive sweostor sweostra
dative (instrumental) sweostor sweostrum
accusative sweostor sweostor

nouns, -r- stem masculine gender
fæder
(father)
singular plural
nominative fæder fæderas
genitive fæder, fæderes fædera
dative (instrumental) fæder, fædere fæderum
accusative fæder fæderas

The nouns of the same type módor (mother) and dohtor (daughter) are declined the same way as the n bróðor, with the exception that in Nom and Acc pl they may also have the ending -a: módra, dohtra.