Declension table of ?phenāyitavya

Neuter	Singular	Dual	Plural
Nominative	phenāyitavyam	phenāyitavye	phenāyitavyāni
Vocative	phenāyitavya	phenāyitavye	phenāyitavyāni
Accusative	phenāyitavyam	phenāyitavye	phenāyitavyāni
Instrumental	phenāyitavyena	phenāyitavyābhyām	phenāyitavyaiḥ
Dative	phenāyitavyāya	phenāyitavyābhyām	phenāyitavyebhyaḥ
Ablative	phenāyitavyāt	phenāyitavyābhyām	phenāyitavyebhyaḥ
Genitive	phenāyitavyasya	phenāyitavyayoḥ	phenāyitavyānām
Locative	phenāyitavye	phenāyitavyayoḥ	phenāyitavyeṣu

Compound phenāyitavya -

Adverb -phenāyitavyam -phenāyitavyāt