Declension table of ?adhyetavya

Neuter	Singular	Dual	Plural
Nominative	adhyetavyam	adhyetavye	adhyetavyāni
Vocative	adhyetavya	adhyetavye	adhyetavyāni
Accusative	adhyetavyam	adhyetavye	adhyetavyāni
Instrumental	adhyetavyena	adhyetavyābhyām	adhyetavyaiḥ
Dative	adhyetavyāya	adhyetavyābhyām	adhyetavyebhyaḥ
Ablative	adhyetavyāt	adhyetavyābhyām	adhyetavyebhyaḥ
Genitive	adhyetavyasya	adhyetavyayoḥ	adhyetavyānām
Locative	adhyetavye	adhyetavyayoḥ	adhyetavyeṣu

Compound adhyetavya -

Adverb -adhyetavyam -adhyetavyāt