Declension table of ?dhrātavya

Neuter	Singular	Dual	Plural
Nominative	dhrātavyam	dhrātavye	dhrātavyāni
Vocative	dhrātavya	dhrātavye	dhrātavyāni
Accusative	dhrātavyam	dhrātavye	dhrātavyāni
Instrumental	dhrātavyena	dhrātavyābhyām	dhrātavyaiḥ
Dative	dhrātavyāya	dhrātavyābhyām	dhrātavyebhyaḥ
Ablative	dhrātavyāt	dhrātavyābhyām	dhrātavyebhyaḥ
Genitive	dhrātavyasya	dhrātavyayoḥ	dhrātavyānām
Locative	dhrātavye	dhrātavyayoḥ	dhrātavyeṣu

Compound dhrātavya -

Adverb -dhrātavyam -dhrātavyāt