Declension table of ?paktavya

Neuter	Singular	Dual	Plural
Nominative	paktavyam	paktavye	paktavyāni
Vocative	paktavya	paktavye	paktavyāni
Accusative	paktavyam	paktavye	paktavyāni
Instrumental	paktavyena	paktavyābhyām	paktavyaiḥ
Dative	paktavyāya	paktavyābhyām	paktavyebhyaḥ
Ablative	paktavyāt	paktavyābhyām	paktavyebhyaḥ
Genitive	paktavyasya	paktavyayoḥ	paktavyānām
Locative	paktavye	paktavyayoḥ	paktavyeṣu

Compound paktavya -

Adverb -paktavyam -paktavyāt