Declension table of ?upavasathya

Neuter	Singular	Dual	Plural
Nominative	upavasathyam	upavasathye	upavasathyāni
Vocative	upavasathya	upavasathye	upavasathyāni
Accusative	upavasathyam	upavasathye	upavasathyāni
Instrumental	upavasathyena	upavasathyābhyām	upavasathyaiḥ
Dative	upavasathyāya	upavasathyābhyām	upavasathyebhyaḥ
Ablative	upavasathyāt	upavasathyābhyām	upavasathyebhyaḥ
Genitive	upavasathyasya	upavasathyayoḥ	upavasathyānām
Locative	upavasathye	upavasathyayoḥ	upavasathyeṣu

Compound upavasathya -

Adverb -upavasathyam -upavasathyāt