Declension table of ?prayācana

Neuter	Singular	Dual	Plural
Nominative	prayācanam	prayācane	prayācanāni
Vocative	prayācana	prayācane	prayācanāni
Accusative	prayācanam	prayācane	prayācanāni
Instrumental	prayācanena	prayācanābhyām	prayācanaiḥ
Dative	prayācanāya	prayācanābhyām	prayācanebhyaḥ
Ablative	prayācanāt	prayācanābhyām	prayācanebhyaḥ
Genitive	prayācanasya	prayācanayoḥ	prayācanānām
Locative	prayācane	prayācanayoḥ	prayācaneṣu

Compound prayācana -

Adverb -prayācanam -prayācanāt