Declension table of ?hṛddvāra

Neuter	Singular	Dual	Plural
Nominative	hṛddvāram	hṛddvāre	hṛddvārāṇi
Vocative	hṛddvāra	hṛddvāre	hṛddvārāṇi
Accusative	hṛddvāram	hṛddvāre	hṛddvārāṇi
Instrumental	hṛddvāreṇa	hṛddvārābhyām	hṛddvāraiḥ
Dative	hṛddvārāya	hṛddvārābhyām	hṛddvārebhyaḥ
Ablative	hṛddvārāt	hṛddvārābhyām	hṛddvārebhyaḥ
Genitive	hṛddvārasya	hṛddvārayoḥ	hṛddvārāṇām
Locative	hṛddvāre	hṛddvārayoḥ	hṛddvāreṣu

Compound hṛddvāra -

Adverb -hṛddvāram -hṛddvārāt