Declension table of ?yatavya

Neuter	Singular	Dual	Plural
Nominative	yatavyam	yatavye	yatavyāni
Vocative	yatavya	yatavye	yatavyāni
Accusative	yatavyam	yatavye	yatavyāni
Instrumental	yatavyena	yatavyābhyām	yatavyaiḥ
Dative	yatavyāya	yatavyābhyām	yatavyebhyaḥ
Ablative	yatavyāt	yatavyābhyām	yatavyebhyaḥ
Genitive	yatavyasya	yatavyayoḥ	yatavyānām
Locative	yatavye	yatavyayoḥ	yatavyeṣu

Compound yatavya -

Adverb -yatavyam -yatavyāt