Declension table of ?nantavya

Masculine	Singular	Dual	Plural
Nominative	nantavyaḥ	nantavyau	nantavyāḥ
Vocative	nantavya	nantavyau	nantavyāḥ
Accusative	nantavyam	nantavyau	nantavyān
Instrumental	nantavyena	nantavyābhyām	nantavyaiḥ nantavyebhiḥ
Dative	nantavyāya	nantavyābhyām	nantavyebhyaḥ
Ablative	nantavyāt	nantavyābhyām	nantavyebhyaḥ
Genitive	nantavyasya	nantavyayoḥ	nantavyānām
Locative	nantavye	nantavyayoḥ	nantavyeṣu

Compound nantavya -

Adverb -nantavyam -nantavyāt