Declension table of ?sanatra

Neuter	Singular	Dual	Plural
Nominative	sanatram	sanatre	sanatrāṇi
Vocative	sanatra	sanatre	sanatrāṇi
Accusative	sanatram	sanatre	sanatrāṇi
Instrumental	sanatreṇa	sanatrābhyām	sanatraiḥ
Dative	sanatrāya	sanatrābhyām	sanatrebhyaḥ
Ablative	sanatrāt	sanatrābhyām	sanatrebhyaḥ
Genitive	sanatrasya	sanatrayoḥ	sanatrāṇām
Locative	sanatre	sanatrayoḥ	sanatreṣu

Compound sanatra -

Adverb -sanatram -sanatrāt