Declension table of ?pratikartavya

Masculine	Singular	Dual	Plural
Nominative	pratikartavyaḥ	pratikartavyau	pratikartavyāḥ
Vocative	pratikartavya	pratikartavyau	pratikartavyāḥ
Accusative	pratikartavyam	pratikartavyau	pratikartavyān
Instrumental	pratikartavyena	pratikartavyābhyām	pratikartavyaiḥ
Dative	pratikartavyāya	pratikartavyābhyām	pratikartavyebhyaḥ
Ablative	pratikartavyāt	pratikartavyābhyām	pratikartavyebhyaḥ
Genitive	pratikartavyasya	pratikartavyayoḥ	pratikartavyānām
Locative	pratikartavye	pratikartavyayoḥ	pratikartavyeṣu

Compound pratikartavya -

Adverb -pratikartavyam -pratikartavyāt