Declension table of upanāya

Masculine	Singular	Dual	Plural
Nominative	upanāyaḥ	upanāyau	upanāyāḥ
Vocative	upanāya	upanāyau	upanāyāḥ
Accusative	upanāyam	upanāyau	upanāyān
Instrumental	upanāyena	upanāyābhyām	upanāyaiḥ upanāyebhiḥ
Dative	upanāyāya	upanāyābhyām	upanāyebhyaḥ
Ablative	upanāyāt	upanāyābhyām	upanāyebhyaḥ
Genitive	upanāyasya	upanāyayoḥ	upanāyānām
Locative	upanāye	upanāyayoḥ	upanāyeṣu

Compound upanāya -

Adverb -upanāyam -upanāyāt