Declension table of ?pṛthamātra

Neuter	Singular	Dual	Plural
Nominative	pṛthamātram	pṛthamātre	pṛthamātrāṇi
Vocative	pṛthamātra	pṛthamātre	pṛthamātrāṇi
Accusative	pṛthamātram	pṛthamātre	pṛthamātrāṇi
Instrumental	pṛthamātreṇa	pṛthamātrābhyām	pṛthamātraiḥ
Dative	pṛthamātrāya	pṛthamātrābhyām	pṛthamātrebhyaḥ
Ablative	pṛthamātrāt	pṛthamātrābhyām	pṛthamātrebhyaḥ
Genitive	pṛthamātrasya	pṛthamātrayoḥ	pṛthamātrāṇām
Locative	pṛthamātre	pṛthamātrayoḥ	pṛthamātreṣu

Compound pṛthamātra -

Adverb -pṛthamātram -pṛthamātrāt