Declension table of pūrvavayasa

Neuter	Singular	Dual	Plural
Nominative	pūrvavayasam	pūrvavayase	pūrvavayasāni
Vocative	pūrvavayasa	pūrvavayase	pūrvavayasāni
Accusative	pūrvavayasam	pūrvavayase	pūrvavayasāni
Instrumental	pūrvavayasena	pūrvavayasābhyām	pūrvavayasaiḥ
Dative	pūrvavayasāya	pūrvavayasābhyām	pūrvavayasebhyaḥ
Ablative	pūrvavayasāt	pūrvavayasābhyām	pūrvavayasebhyaḥ
Genitive	pūrvavayasasya	pūrvavayasayoḥ	pūrvavayasānām
Locative	pūrvavayase	pūrvavayasayoḥ	pūrvavayaseṣu

Compound pūrvavayasa -

Adverb -pūrvavayasam -pūrvavayasāt