Declension table of ?cīvitavya

Neuter	Singular	Dual	Plural
Nominative	cīvitavyam	cīvitavye	cīvitavyāni
Vocative	cīvitavya	cīvitavye	cīvitavyāni
Accusative	cīvitavyam	cīvitavye	cīvitavyāni
Instrumental	cīvitavyena	cīvitavyābhyām	cīvitavyaiḥ
Dative	cīvitavyāya	cīvitavyābhyām	cīvitavyebhyaḥ
Ablative	cīvitavyāt	cīvitavyābhyām	cīvitavyebhyaḥ
Genitive	cīvitavyasya	cīvitavyayoḥ	cīvitavyānām
Locative	cīvitavye	cīvitavyayoḥ	cīvitavyeṣu

Compound cīvitavya -

Adverb -cīvitavyam -cīvitavyāt