Declension table of ?upagāyana

Neuter	Singular	Dual	Plural
Nominative	upagāyanam	upagāyane	upagāyanāni
Vocative	upagāyana	upagāyane	upagāyanāni
Accusative	upagāyanam	upagāyane	upagāyanāni
Instrumental	upagāyanena	upagāyanābhyām	upagāyanaiḥ
Dative	upagāyanāya	upagāyanābhyām	upagāyanebhyaḥ
Ablative	upagāyanāt	upagāyanābhyām	upagāyanebhyaḥ
Genitive	upagāyanasya	upagāyanayoḥ	upagāyanānām
Locative	upagāyane	upagāyanayoḥ	upagāyaneṣu

Compound upagāyana -

Adverb -upagāyanam -upagāyanāt