Declension table of ?nihantavya

Masculine	Singular	Dual	Plural
Nominative	nihantavyaḥ	nihantavyau	nihantavyāḥ
Vocative	nihantavya	nihantavyau	nihantavyāḥ
Accusative	nihantavyam	nihantavyau	nihantavyān
Instrumental	nihantavyena	nihantavyābhyām	nihantavyaiḥ nihantavyebhiḥ
Dative	nihantavyāya	nihantavyābhyām	nihantavyebhyaḥ
Ablative	nihantavyāt	nihantavyābhyām	nihantavyebhyaḥ
Genitive	nihantavyasya	nihantavyayoḥ	nihantavyānām
Locative	nihantavye	nihantavyayoḥ	nihantavyeṣu

Compound nihantavya -

Adverb -nihantavyam -nihantavyāt