Declension table of ?vasayitavya

Neuter	Singular	Dual	Plural
Nominative	vasayitavyam	vasayitavye	vasayitavyāni
Vocative	vasayitavya	vasayitavye	vasayitavyāni
Accusative	vasayitavyam	vasayitavye	vasayitavyāni
Instrumental	vasayitavyena	vasayitavyābhyām	vasayitavyaiḥ
Dative	vasayitavyāya	vasayitavyābhyām	vasayitavyebhyaḥ
Ablative	vasayitavyāt	vasayitavyābhyām	vasayitavyebhyaḥ
Genitive	vasayitavyasya	vasayitavyayoḥ	vasayitavyānām
Locative	vasayitavye	vasayitavyayoḥ	vasayitavyeṣu

Compound vasayitavya -

Adverb -vasayitavyam -vasayitavyāt