Declension table of ?prathamavayasin

Neuter	Singular	Dual	Plural
Nominative	prathamavayasi	prathamavayasinī	prathamavayasīni
Vocative	prathamavayasin prathamavayasi	prathamavayasinī	prathamavayasīni
Accusative	prathamavayasi	prathamavayasinī	prathamavayasīni
Instrumental	prathamavayasinā	prathamavayasibhyām	prathamavayasibhiḥ
Dative	prathamavayasine	prathamavayasibhyām	prathamavayasibhyaḥ
Ablative	prathamavayasinaḥ	prathamavayasibhyām	prathamavayasibhyaḥ
Genitive	prathamavayasinaḥ	prathamavayasinoḥ	prathamavayasinām
Locative	prathamavayasini	prathamavayasinoḥ	prathamavayasiṣu

Compound prathamavayasi -

Adverb -prathamavayasi