Declension table of ?ruṃśayitavya

Masculine	Singular	Dual	Plural
Nominative	ruṃśayitavyaḥ	ruṃśayitavyau	ruṃśayitavyāḥ
Vocative	ruṃśayitavya	ruṃśayitavyau	ruṃśayitavyāḥ
Accusative	ruṃśayitavyam	ruṃśayitavyau	ruṃśayitavyān
Instrumental	ruṃśayitavyena	ruṃśayitavyābhyām	ruṃśayitavyaiḥ ruṃśayitavyebhiḥ
Dative	ruṃśayitavyāya	ruṃśayitavyābhyām	ruṃśayitavyebhyaḥ
Ablative	ruṃśayitavyāt	ruṃśayitavyābhyām	ruṃśayitavyebhyaḥ
Genitive	ruṃśayitavyasya	ruṃśayitavyayoḥ	ruṃśayitavyānām
Locative	ruṃśayitavye	ruṃśayitavyayoḥ	ruṃśayitavyeṣu

Compound ruṃśayitavya -

Adverb -ruṃśayitavyam -ruṃśayitavyāt