Declension table of ?upasthātṛ

Masculine	Singular	Dual	Plural
Nominative	upasthātā	upasthātārau	upasthātāraḥ
Vocative	upasthātaḥ	upasthātārau	upasthātāraḥ
Accusative	upasthātāram	upasthātārau	upasthātṝn
Instrumental	upasthātrā	upasthātṛbhyām	upasthātṛbhiḥ
Dative	upasthātre	upasthātṛbhyām	upasthātṛbhyaḥ
Ablative	upasthātuḥ	upasthātṛbhyām	upasthātṛbhyaḥ
Genitive	upasthātuḥ	upasthātroḥ	upasthātṝṇām
Locative	upasthātari	upasthātroḥ	upasthātṛṣu

Compound upasthātṛ -

Adverb -upasthātṛ