118. When suffixed to its noun it undergoes various changes. In its monosyllabic forms it drops its vowel after a short (un-accented) vowel, as in auga-t (the eye), but keeps it after a long vowel, as in ā-in (the river), trē-it (the tree). The dissyllabic forms drop their initial vowel almost everywhere; not, however, after the -ar, -r, of the gen. sg., nor in męnninir (men, nom.), męnn-ina (men, acc.). The -m of the dat. pl. is dropped before the suffixed -num.
| Masc. | Neut. | Fem. | |
| Sg. Nom. | fiskr-inn | skip-it | gjǫf-in |
| Acc. | fisk-inn | skip-it | gjǫf-ina |
| Dat. | fiski-num | skipi-nu | gjǫf-inni |
| Gen. | fisks-ins | skips-ins | gjafar-innar |
| Pl. Nom. | fiskar-nir | skip-in | gjafar-nar |
| Acc. | fiska-na | skip-in | gjafar-nar |
| Dat. | fisku-num | skipu-num | gjǫfu-num |
| Gen. | fiska-nna | skipa-nna | gjafa-nna |
| Masc. | Neut. | Fem. | |
| Sg. Nom. | bogi-nn | auga-t | tunga-n |
| Acc. | boga-nn | auga-t | tungu-na |
| Dat. | boga-num | auga-nu | tungu-nni |
| Gen. | boga-ns | auga-ns | tungu-nnar |
| Pl. Nom. | bogar-nir | augu-n | tungur-nar |
| Acc. | boga-na | augu-n | tungur-nar |
| Dat. | bogu-num | augu-num | tungnu-num |
| Gen. | boga-nna | augna-nna | tungna-nna |
Relative
119. The ordinary relative pron. is the indeclinable er, often preceded by sā: sā er = he who, who, sū er who fem.
Interrogative
120. The neut. hvat has gen. hvess, dat. hvī, which last is chiefly used as an adverb = 'why.'
| Masc. | Neut. | Fem. | |
| Sg. Nom. | hvārr (which of two) | hvārt | hvār |
| Acc. | hvārn | hvārt | hvāra |
| Dat. | hvārum | hvāru | hvārri |
| Gen. | hvārs | hvārs | hvārrar |
| Pl. Nom. | hvārir | hvār | hvārar |
| Acc. | hvāra | hvār | hvārar |
| Dat. | hvārum | hvārum | hvārum |
| Gen. | hvārra | hvārra | hvārra |