Declension table of ?riṇvya

Neuter	Singular	Dual	Plural
Nominative	riṇvyam	riṇvye	riṇvyāni
Vocative	riṇvya	riṇvye	riṇvyāni
Accusative	riṇvyam	riṇvye	riṇvyāni
Instrumental	riṇvyena	riṇvyābhyām	riṇvyaiḥ
Dative	riṇvyāya	riṇvyābhyām	riṇvyebhyaḥ
Ablative	riṇvyāt	riṇvyābhyām	riṇvyebhyaḥ
Genitive	riṇvyasya	riṇvyayoḥ	riṇvyānām
Locative	riṇvye	riṇvyayoḥ	riṇvyeṣu

Compound riṇvya -

Adverb -riṇvyam -riṇvyāt