Declension table of ?hṛdayin

Neuter	Singular	Dual	Plural
Nominative	hṛdayi	hṛdayinī	hṛdayīni
Vocative	hṛdayin hṛdayi	hṛdayinī	hṛdayīni
Accusative	hṛdayi	hṛdayinī	hṛdayīni
Instrumental	hṛdayinā	hṛdayibhyām	hṛdayibhiḥ
Dative	hṛdayine	hṛdayibhyām	hṛdayibhyaḥ
Ablative	hṛdayinaḥ	hṛdayibhyām	hṛdayibhyaḥ
Genitive	hṛdayinaḥ	hṛdayinoḥ	hṛdayinām
Locative	hṛdayini	hṛdayinoḥ	hṛdayiṣu

Compound hṛdayi -

Adverb -hṛdayi