Declension table of ?ṛdhuka

Neuter	Singular	Dual	Plural
Nominative	ṛdhukam	ṛdhuke	ṛdhukāni
Vocative	ṛdhuka	ṛdhuke	ṛdhukāni
Accusative	ṛdhukam	ṛdhuke	ṛdhukāni
Instrumental	ṛdhukena	ṛdhukābhyām	ṛdhukaiḥ
Dative	ṛdhukāya	ṛdhukābhyām	ṛdhukebhyaḥ
Ablative	ṛdhukāt	ṛdhukābhyām	ṛdhukebhyaḥ
Genitive	ṛdhukasya	ṛdhukayoḥ	ṛdhukānām
Locative	ṛdhuke	ṛdhukayoḥ	ṛdhukeṣu

Compound ṛdhuka -

Adverb -ṛdhukam -ṛdhukāt