Declension table of ?upātaṅkya

Neuter	Singular	Dual	Plural
Nominative	upātaṅkyam	upātaṅkye	upātaṅkyāni
Vocative	upātaṅkya	upātaṅkye	upātaṅkyāni
Accusative	upātaṅkyam	upātaṅkye	upātaṅkyāni
Instrumental	upātaṅkyena	upātaṅkyābhyām	upātaṅkyaiḥ
Dative	upātaṅkyāya	upātaṅkyābhyām	upātaṅkyebhyaḥ
Ablative	upātaṅkyāt	upātaṅkyābhyām	upātaṅkyebhyaḥ
Genitive	upātaṅkyasya	upātaṅkyayoḥ	upātaṅkyānām
Locative	upātaṅkye	upātaṅkyayoḥ	upātaṅkyeṣu

Compound upātaṅkya -

Adverb -upātaṅkyam -upātaṅkyāt