Declension table of ?prayācaka

Neuter	Singular	Dual	Plural
Nominative	prayācakam	prayācake	prayācakāni
Vocative	prayācaka	prayācake	prayācakāni
Accusative	prayācakam	prayācake	prayācakāni
Instrumental	prayācakena	prayācakābhyām	prayācakaiḥ
Dative	prayācakāya	prayācakābhyām	prayācakebhyaḥ
Ablative	prayācakāt	prayācakābhyām	prayācakebhyaḥ
Genitive	prayācakasya	prayācakayoḥ	prayācakānām
Locative	prayācake	prayācakayoḥ	prayācakeṣu

Compound prayācaka -

Adverb -prayācakam -prayācakāt