Declension table of ?cetavya

Neuter	Singular	Dual	Plural
Nominative	cetavyam	cetavye	cetavyāni
Vocative	cetavya	cetavye	cetavyāni
Accusative	cetavyam	cetavye	cetavyāni
Instrumental	cetavyena	cetavyābhyām	cetavyaiḥ
Dative	cetavyāya	cetavyābhyām	cetavyebhyaḥ
Ablative	cetavyāt	cetavyābhyām	cetavyebhyaḥ
Genitive	cetavyasya	cetavyayoḥ	cetavyānām
Locative	cetavye	cetavyayoḥ	cetavyeṣu

Compound cetavya -

Adverb -cetavyam -cetavyāt