Declension table of ?ṛdhuka

Masculine	Singular	Dual	Plural
Nominative	ṛdhukaḥ	ṛdhukau	ṛdhukāḥ
Vocative	ṛdhuka	ṛdhukau	ṛdhukāḥ
Accusative	ṛdhukam	ṛdhukau	ṛdhukān
Instrumental	ṛdhukena	ṛdhukābhyām	ṛdhukaiḥ ṛdhukebhiḥ
Dative	ṛdhukāya	ṛdhukābhyām	ṛdhukebhyaḥ
Ablative	ṛdhukāt	ṛdhukābhyām	ṛdhukebhyaḥ
Genitive	ṛdhukasya	ṛdhukayoḥ	ṛdhukānām
Locative	ṛdhuke	ṛdhukayoḥ	ṛdhukeṣu

Compound ṛdhuka -

Adverb -ṛdhukam -ṛdhukāt