Declension table of ?petavya

Neuter	Singular	Dual	Plural
Nominative	petavyam	petavye	petavyāni
Vocative	petavya	petavye	petavyāni
Accusative	petavyam	petavye	petavyāni
Instrumental	petavyena	petavyābhyām	petavyaiḥ
Dative	petavyāya	petavyābhyām	petavyebhyaḥ
Ablative	petavyāt	petavyābhyām	petavyebhyaḥ
Genitive	petavyasya	petavyayoḥ	petavyānām
Locative	petavye	petavyayoḥ	petavyeṣu

Compound petavya -

Adverb -petavyam -petavyāt