Declension table of ?kṛṣṇayitavya

Neuter	Singular	Dual	Plural
Nominative	kṛṣṇayitavyam	kṛṣṇayitavye	kṛṣṇayitavyāni
Vocative	kṛṣṇayitavya	kṛṣṇayitavye	kṛṣṇayitavyāni
Accusative	kṛṣṇayitavyam	kṛṣṇayitavye	kṛṣṇayitavyāni
Instrumental	kṛṣṇayitavyena	kṛṣṇayitavyābhyām	kṛṣṇayitavyaiḥ
Dative	kṛṣṇayitavyāya	kṛṣṇayitavyābhyām	kṛṣṇayitavyebhyaḥ
Ablative	kṛṣṇayitavyāt	kṛṣṇayitavyābhyām	kṛṣṇayitavyebhyaḥ
Genitive	kṛṣṇayitavyasya	kṛṣṇayitavyayoḥ	kṛṣṇayitavyānām
Locative	kṛṣṇayitavye	kṛṣṇayitavyayoḥ	kṛṣṇayitavyeṣu

Compound kṛṣṇayitavya -

Adverb -kṛṣṇayitavyam -kṛṣṇayitavyāt