Declension table of ?dhvaṃsayitavya

Neuter	Singular	Dual	Plural
Nominative	dhvaṃsayitavyam	dhvaṃsayitavye	dhvaṃsayitavyāni
Vocative	dhvaṃsayitavya	dhvaṃsayitavye	dhvaṃsayitavyāni
Accusative	dhvaṃsayitavyam	dhvaṃsayitavye	dhvaṃsayitavyāni
Instrumental	dhvaṃsayitavyena	dhvaṃsayitavyābhyām	dhvaṃsayitavyaiḥ
Dative	dhvaṃsayitavyāya	dhvaṃsayitavyābhyām	dhvaṃsayitavyebhyaḥ
Ablative	dhvaṃsayitavyāt	dhvaṃsayitavyābhyām	dhvaṃsayitavyebhyaḥ
Genitive	dhvaṃsayitavyasya	dhvaṃsayitavyayoḥ	dhvaṃsayitavyānām
Locative	dhvaṃsayitavye	dhvaṃsayitavyayoḥ	dhvaṃsayitavyeṣu

Compound dhvaṃsayitavya -

Adverb -dhvaṃsayitavyam -dhvaṃsayitavyāt