nyrðri

Old Norse

Originally a comparative form of the adverb norðr. From Proto-Germanic *nurþrōzô (comparative of *nurþraz (“north”)); the umlaut could be from an alternative form, and or analogous from syðri. Ultimately from Proto-Indo-European *h₁en (“in”).

nyrðri (comparative nyrðri, superlative nyrztr)

(comparative) more northerly
(superlative) most northerly
- liggja þessi lǫnd nyrzt
  these lands lie northernmost

This word is one of a little handful of adjectives with defective inflection, existing only in the comparative and superlative forms.

Declension of nyrðri

singular	masculine	feminine	neuter
nominative	nyrðri	nyrðri	nyrðra
accusative	nyrðra	nyrðri	nyrðra
dative	nyrðra	nyrðri	nyrðra
genitive	nyrðra	nyrðri	nyrðra
plural	masculine	feminine	neuter
nominative	nyrðri	nyrðri	nyrðri
accusative	nyrðri	nyrðri	nyrðri
dative	nyrðrum	nyrðrum	nyrðrum
genitive	nyrðri	nyrðri	nyrðri

Strong declension of superlative of nyrðri

singular	masculine	feminine	neuter
nominative	nyrztr	nyrzt	nyrzt
accusative	nyrztan	nyrzta	nyrzt
dative	nyrztum	nyrztri	nyrztu
genitive	nyrzts	nyrztrar	nyrzts
plural	masculine	feminine	neuter
nominative	nyrztir	nyrztar	nyrzt
accusative	nyrzta	nyrztar	nyrzt
dative	nyrztum	nyrztum	nyrztum
genitive	nyrztra	nyrztra	nyrztra

Weak declension of superlative of nyrðri

singular	masculine	feminine	neuter
nominative	nyrzti	nyrzta	nyrzta
accusative	nyrzta	nyrztu	nyrzta
dative	nyrzta	nyrztu	nyrzta
genitive	nyrzta	nyrztu	nyrzta
plural	masculine	feminine	neuter
nominative	nyrztu	nyrztu	nyrztu
accusative	nyrztu	nyrztu	nyrztu
dative	nyrztum	nyrztum	nyrztum
genitive	nyrztu	nyrztu	nyrztu

nyrðri, nyrztr in A Concise Dictionary of Old Icelandic, G. T. Zoëga, Clarendon Press, 1910, at Internet Archive.
“nørdre” in The Nynorsk Dictionary.