Declension table of hantavya

Masculine	Singular	Dual	Plural
Nominative	hantavyaḥ	hantavyau	hantavyāḥ
Vocative	hantavya	hantavyau	hantavyāḥ
Accusative	hantavyam	hantavyau	hantavyān
Instrumental	hantavyena	hantavyābhyām	hantavyaiḥ hantavyebhiḥ
Dative	hantavyāya	hantavyābhyām	hantavyebhyaḥ
Ablative	hantavyāt	hantavyābhyām	hantavyebhyaḥ
Genitive	hantavyasya	hantavyayoḥ	hantavyānām
Locative	hantavye	hantavyayoḥ	hantavyeṣu

Compound hantavya -

Adverb -hantavyam -hantavyāt