Declension table of ?upasthāyin

Neuter	Singular	Dual	Plural
Nominative	upasthāyi	upasthāyinī	upasthāyīni
Vocative	upasthāyin upasthāyi	upasthāyinī	upasthāyīni
Accusative	upasthāyi	upasthāyinī	upasthāyīni
Instrumental	upasthāyinā	upasthāyibhyām	upasthāyibhiḥ
Dative	upasthāyine	upasthāyibhyām	upasthāyibhyaḥ
Ablative	upasthāyinaḥ	upasthāyibhyām	upasthāyibhyaḥ
Genitive	upasthāyinaḥ	upasthāyinoḥ	upasthāyinām
Locative	upasthāyini	upasthāyinoḥ	upasthāyiṣu

Compound upasthāyi -

Adverb -upasthāyi