Declension table of ?dartavya

Neuter	Singular	Dual	Plural
Nominative	dartavyam	dartavye	dartavyāni
Vocative	dartavya	dartavye	dartavyāni
Accusative	dartavyam	dartavye	dartavyāni
Instrumental	dartavyena	dartavyābhyām	dartavyaiḥ
Dative	dartavyāya	dartavyābhyām	dartavyebhyaḥ
Ablative	dartavyāt	dartavyābhyām	dartavyebhyaḥ
Genitive	dartavyasya	dartavyayoḥ	dartavyānām
Locative	dartavye	dartavyayoḥ	dartavyeṣu

Compound dartavya -

Adverb -dartavyam -dartavyāt