Declension table of ?petavya

Masculine	Singular	Dual	Plural
Nominative	petavyaḥ	petavyau	petavyāḥ
Vocative	petavya	petavyau	petavyāḥ
Accusative	petavyam	petavyau	petavyān
Instrumental	petavyena	petavyābhyām	petavyaiḥ petavyebhiḥ
Dative	petavyāya	petavyābhyām	petavyebhyaḥ
Ablative	petavyāt	petavyābhyām	petavyebhyaḥ
Genitive	petavyasya	petavyayoḥ	petavyānām
Locative	petavye	petavyayoḥ	petavyeṣu

Compound petavya -

Adverb -petavyam -petavyāt