Declension table of ?kāyavya

Masculine	Singular	Dual	Plural
Nominative	kāyavyaḥ	kāyavyau	kāyavyāḥ
Vocative	kāyavya	kāyavyau	kāyavyāḥ
Accusative	kāyavyam	kāyavyau	kāyavyān
Instrumental	kāyavyena	kāyavyābhyām	kāyavyaiḥ kāyavyebhiḥ
Dative	kāyavyāya	kāyavyābhyām	kāyavyebhyaḥ
Ablative	kāyavyāt	kāyavyābhyām	kāyavyebhyaḥ
Genitive	kāyavyasya	kāyavyayoḥ	kāyavyānām
Locative	kāyavye	kāyavyayoḥ	kāyavyeṣu

Compound kāyavya -

Adverb -kāyavyam -kāyavyāt