Declension table of ?natra

Neuter	Singular	Dual	Plural
Nominative	natram	natre	natrāṇi
Vocative	natra	natre	natrāṇi
Accusative	natram	natre	natrāṇi
Instrumental	natreṇa	natrābhyām	natraiḥ
Dative	natrāya	natrābhyām	natrebhyaḥ
Ablative	natrāt	natrābhyām	natrebhyaḥ
Genitive	natrasya	natrayoḥ	natrāṇām
Locative	natre	natrayoḥ	natreṣu

Compound natra -

Adverb -natram -natrāt