Declension table of ?hṛdvraṇa

Masculine	Singular	Dual	Plural
Nominative	hṛdvraṇaḥ	hṛdvraṇau	hṛdvraṇāḥ
Vocative	hṛdvraṇa	hṛdvraṇau	hṛdvraṇāḥ
Accusative	hṛdvraṇam	hṛdvraṇau	hṛdvraṇān
Instrumental	hṛdvraṇena	hṛdvraṇābhyām	hṛdvraṇaiḥ hṛdvraṇebhiḥ
Dative	hṛdvraṇāya	hṛdvraṇābhyām	hṛdvraṇebhyaḥ
Ablative	hṛdvraṇāt	hṛdvraṇābhyām	hṛdvraṇebhyaḥ
Genitive	hṛdvraṇasya	hṛdvraṇayoḥ	hṛdvraṇānām
Locative	hṛdvraṇe	hṛdvraṇayoḥ	hṛdvraṇeṣu

Compound hṛdvraṇa -

Adverb -hṛdvraṇam -hṛdvraṇāt