Declension table of ?prathamavayas

Neuter	Singular	Dual	Plural
Nominative	prathamavayaḥ	prathamavayasī	prathamavayāṃsi
Vocative	prathamavayaḥ	prathamavayasī	prathamavayāṃsi
Accusative	prathamavayaḥ	prathamavayasī	prathamavayāṃsi
Instrumental	prathamavayasā	prathamavayobhyām	prathamavayobhiḥ
Dative	prathamavayase	prathamavayobhyām	prathamavayobhyaḥ
Ablative	prathamavayasaḥ	prathamavayobhyām	prathamavayobhyaḥ
Genitive	prathamavayasaḥ	prathamavayasoḥ	prathamavayasām
Locative	prathamavayasi	prathamavayasoḥ	prathamavayaḥsu

Compound prathamavayas -

Adverb -prathamavayas