| nouns | verbs | adjectives | pronouns | numerals | prepositions | conjunctions | adverbs |
nouns: · a-stems · va-stems · ja-stems · ia-stems · ô-stems · vô-stems · jô-stems · iô-stems · i-stems · u-stems · an-stems · ôn-stems · în-stems · nd-stems · root nouns · r-stems ·
nouns: ROOT NOUNS
are either masculine or feminine. They were originally both inflected alike, but in OIcel. the singular forms of the masculine ones are borrowed from either the a-stems (maðr) or the u-stems (fótr). The only thing that really differs from the a- or u-stem inflection is that the plural nom. and acc. endings are both -r. The very same thing is the difference between the feminine root nouns and the ô-stems.
A few feminine nouns of this class, though, have the very old nominative ending -r (+ i-umlaut), like the masculine ones, and some have the ending -r (+ i-umlaut) in the genitive.

masculinefeminine
sing.plur.sing.plur.
nom.fót-rmað-r nom.fœt-rmennnom.bót- nom.bœt-r
gen.fót-armann-s gen.fót-amann-agen.bót-ar gen.bót-a
dat.fœt-imann-i dat.fót-ummönn-umdat.bót-i dat.bót-um
acc.fót-mann- acc.fœt-rmennacc.bót- acc.bœt-r

like fótr:like maðr:like bót:
· fótr 'foot'
· vetr 'winter' ; the /r/ is part of the stem - gen. vetrar
· maðr 'human, man' ; /nn/ has become /ð/ before the ending -r in nom. sing.
· bót 'fine'
· nótt 'night'
· kýr 'cow' ; gen. sing. kýr, dat. kú etc.
· töng 'tongs'
· tönn 'tooth'


The root nouns have their origin in PIE root nouns, i.e. suffixless nouns:
masc. sing. nom: -R < -z < -s ; gen: =u-stem or =a-stem ; dat: ; acc: -u < -un < -m
masc. plur. nom: -iR < -iz < -es ; gen: =a-stem ; dat: =a-stem ; acc: -iR < =nom.
fem. sing. nom: =ô-stem ; gen: =ô-stem ; dat: =ô-stem ; acc: -u < -un < -m
fem. plur. nom: -iR < -iz < -es ; gen: =a-stem ; dat: =a-stem ; acc: -iR < =nom.

© Peter Pettersson