Declension table of ?ṛdūvṛdh

Neuter	Singular	Dual	Plural
Nominative	ṛdūvṛt	ṛdūvṛdhī	ṛdūvṛndhi
Vocative	ṛdūvṛt	ṛdūvṛdhī	ṛdūvṛndhi
Accusative	ṛdūvṛt	ṛdūvṛdhī	ṛdūvṛndhi
Instrumental	ṛdūvṛdhā	ṛdūvṛdbhyām	ṛdūvṛdbhiḥ
Dative	ṛdūvṛdhe	ṛdūvṛdbhyām	ṛdūvṛdbhyaḥ
Ablative	ṛdūvṛdhaḥ	ṛdūvṛdbhyām	ṛdūvṛdbhyaḥ
Genitive	ṛdūvṛdhaḥ	ṛdūvṛdhoḥ	ṛdūvṛdhām
Locative	ṛdūvṛdhi	ṛdūvṛdhoḥ	ṛdūvṛtsu

Compound ṛdūvṛt -

Adverb -ṛdūvṛt