Declension table of ?karṣṭavya

Neuter	Singular	Dual	Plural
Nominative	karṣṭavyam	karṣṭavye	karṣṭavyāni
Vocative	karṣṭavya	karṣṭavye	karṣṭavyāni
Accusative	karṣṭavyam	karṣṭavye	karṣṭavyāni
Instrumental	karṣṭavyena	karṣṭavyābhyām	karṣṭavyaiḥ
Dative	karṣṭavyāya	karṣṭavyābhyām	karṣṭavyebhyaḥ
Ablative	karṣṭavyāt	karṣṭavyābhyām	karṣṭavyebhyaḥ
Genitive	karṣṭavyasya	karṣṭavyayoḥ	karṣṭavyānām
Locative	karṣṭavye	karṣṭavyayoḥ	karṣṭavyeṣu

Compound karṣṭavya -

Adverb -karṣṭavyam -karṣṭavyāt