Declension table of ?hṛdīka

Masculine	Singular	Dual	Plural
Nominative	hṛdīkaḥ	hṛdīkau	hṛdīkāḥ
Vocative	hṛdīka	hṛdīkau	hṛdīkāḥ
Accusative	hṛdīkam	hṛdīkau	hṛdīkān
Instrumental	hṛdīkena	hṛdīkābhyām	hṛdīkaiḥ hṛdīkebhiḥ
Dative	hṛdīkāya	hṛdīkābhyām	hṛdīkebhyaḥ
Ablative	hṛdīkāt	hṛdīkābhyām	hṛdīkebhyaḥ
Genitive	hṛdīkasya	hṛdīkayoḥ	hṛdīkānām
Locative	hṛdīke	hṛdīkayoḥ	hṛdīkeṣu

Compound hṛdīka -

Adverb -hṛdīkam -hṛdīkāt