Declension table of ?bhettavya

Neuter	Singular	Dual	Plural
Nominative	bhettavyam	bhettavye	bhettavyāni
Vocative	bhettavya	bhettavye	bhettavyāni
Accusative	bhettavyam	bhettavye	bhettavyāni
Instrumental	bhettavyena	bhettavyābhyām	bhettavyaiḥ
Dative	bhettavyāya	bhettavyābhyām	bhettavyebhyaḥ
Ablative	bhettavyāt	bhettavyābhyām	bhettavyebhyaḥ
Genitive	bhettavyasya	bhettavyayoḥ	bhettavyānām
Locative	bhettavye	bhettavyayoḥ	bhettavyeṣu

Compound bhettavya -

Adverb -bhettavyam -bhettavyāt