Declension table of ?tarhitavya

Neuter	Singular	Dual	Plural
Nominative	tarhitavyam	tarhitavye	tarhitavyāni
Vocative	tarhitavya	tarhitavye	tarhitavyāni
Accusative	tarhitavyam	tarhitavye	tarhitavyāni
Instrumental	tarhitavyena	tarhitavyābhyām	tarhitavyaiḥ
Dative	tarhitavyāya	tarhitavyābhyām	tarhitavyebhyaḥ
Ablative	tarhitavyāt	tarhitavyābhyām	tarhitavyebhyaḥ
Genitive	tarhitavyasya	tarhitavyayoḥ	tarhitavyānām
Locative	tarhitavye	tarhitavyayoḥ	tarhitavyeṣu

Compound tarhitavya -

Adverb -tarhitavyam -tarhitavyāt