Declension table of ?prayas

Neuter	Singular	Dual	Plural
Nominative	prayaḥ	prayasī	prayāṃsi
Vocative	prayaḥ	prayasī	prayāṃsi
Accusative	prayaḥ	prayasī	prayāṃsi
Instrumental	prayasā	prayobhyām	prayobhiḥ
Dative	prayase	prayobhyām	prayobhyaḥ
Ablative	prayasaḥ	prayobhyām	prayobhyaḥ
Genitive	prayasaḥ	prayasoḥ	prayasām
Locative	prayasi	prayasoḥ	prayaḥsu

Compound prayas -

Adverb -prayas