Declension table of ?karpayitavya

Neuter	Singular	Dual	Plural
Nominative	karpayitavyam	karpayitavye	karpayitavyāni
Vocative	karpayitavya	karpayitavye	karpayitavyāni
Accusative	karpayitavyam	karpayitavye	karpayitavyāni
Instrumental	karpayitavyena	karpayitavyābhyām	karpayitavyaiḥ
Dative	karpayitavyāya	karpayitavyābhyām	karpayitavyebhyaḥ
Ablative	karpayitavyāt	karpayitavyābhyām	karpayitavyebhyaḥ
Genitive	karpayitavyasya	karpayitavyayoḥ	karpayitavyānām
Locative	karpayitavye	karpayitavyayoḥ	karpayitavyeṣu

Compound karpayitavya -

Adverb -karpayitavyam -karpayitavyāt