Declension table of ?kāravya

Masculine	Singular	Dual	Plural
Nominative	kāravyaḥ	kāravyau	kāravyāḥ
Vocative	kāravya	kāravyau	kāravyāḥ
Accusative	kāravyam	kāravyau	kāravyān
Instrumental	kāravyeṇa	kāravyābhyām	kāravyaiḥ kāravyebhiḥ
Dative	kāravyāya	kāravyābhyām	kāravyebhyaḥ
Ablative	kāravyāt	kāravyābhyām	kāravyebhyaḥ
Genitive	kāravyasya	kāravyayoḥ	kāravyāṇām
Locative	kāravye	kāravyayoḥ	kāravyeṣu

Compound kāravya -

Adverb -kāravyam -kāravyāt