Declension table of ?prayasta

Neuter	Singular	Dual	Plural
Nominative	prayastam	prayaste	prayastāni
Vocative	prayasta	prayaste	prayastāni
Accusative	prayastam	prayaste	prayastāni
Instrumental	prayastena	prayastābhyām	prayastaiḥ
Dative	prayastāya	prayastābhyām	prayastebhyaḥ
Ablative	prayastāt	prayastābhyām	prayastebhyaḥ
Genitive	prayastasya	prayastayoḥ	prayastānām
Locative	prayaste	prayastayoḥ	prayasteṣu

Compound prayasta -

Adverb -prayastam -prayastāt