Declension table of ?prāśastya

Neuter	Singular	Dual	Plural
Nominative	prāśastyam	prāśastye	prāśastyāni
Vocative	prāśastya	prāśastye	prāśastyāni
Accusative	prāśastyam	prāśastye	prāśastyāni
Instrumental	prāśastyena	prāśastyābhyām	prāśastyaiḥ
Dative	prāśastyāya	prāśastyābhyām	prāśastyebhyaḥ
Ablative	prāśastyāt	prāśastyābhyām	prāśastyebhyaḥ
Genitive	prāśastyasya	prāśastyayoḥ	prāśastyānām
Locative	prāśastye	prāśastyayoḥ	prāśastyeṣu

Compound prāśastya -

Adverb -prāśastyam -prāśastyāt