Declension table of ?vāsayitavya

Neuter	Singular	Dual	Plural
Nominative	vāsayitavyam	vāsayitavye	vāsayitavyāni
Vocative	vāsayitavya	vāsayitavye	vāsayitavyāni
Accusative	vāsayitavyam	vāsayitavye	vāsayitavyāni
Instrumental	vāsayitavyena	vāsayitavyābhyām	vāsayitavyaiḥ
Dative	vāsayitavyāya	vāsayitavyābhyām	vāsayitavyebhyaḥ
Ablative	vāsayitavyāt	vāsayitavyābhyām	vāsayitavyebhyaḥ
Genitive	vāsayitavyasya	vāsayitavyayoḥ	vāsayitavyānām
Locative	vāsayitavye	vāsayitavyayoḥ	vāsayitavyeṣu

Compound vāsayitavya -

Adverb -vāsayitavyam -vāsayitavyāt