Declension table of ?upasthāyaka

Masculine	Singular	Dual	Plural
Nominative	upasthāyakaḥ	upasthāyakau	upasthāyakāḥ
Vocative	upasthāyaka	upasthāyakau	upasthāyakāḥ
Accusative	upasthāyakam	upasthāyakau	upasthāyakān
Instrumental	upasthāyakena	upasthāyakābhyām	upasthāyakaiḥ upasthāyakebhiḥ
Dative	upasthāyakāya	upasthāyakābhyām	upasthāyakebhyaḥ
Ablative	upasthāyakāt	upasthāyakābhyām	upasthāyakebhyaḥ
Genitive	upasthāyakasya	upasthāyakayoḥ	upasthāyakānām
Locative	upasthāyake	upasthāyakayoḥ	upasthāyakeṣu

Compound upasthāyaka -

Adverb -upasthāyakam -upasthāyakāt