Declension table of ?karptavya

Masculine	Singular	Dual	Plural
Nominative	karptavyaḥ	karptavyau	karptavyāḥ
Vocative	karptavya	karptavyau	karptavyāḥ
Accusative	karptavyam	karptavyau	karptavyān
Instrumental	karptavyena	karptavyābhyām	karptavyaiḥ karptavyebhiḥ
Dative	karptavyāya	karptavyābhyām	karptavyebhyaḥ
Ablative	karptavyāt	karptavyābhyām	karptavyebhyaḥ
Genitive	karptavyasya	karptavyayoḥ	karptavyānām
Locative	karptavye	karptavyayoḥ	karptavyeṣu

Compound karptavya -

Adverb -karptavyam -karptavyāt