Declension table of ?hṛdayya

Neuter	Singular	Dual	Plural
Nominative	hṛdayyam	hṛdayye	hṛdayyāni
Vocative	hṛdayya	hṛdayye	hṛdayyāni
Accusative	hṛdayyam	hṛdayye	hṛdayyāni
Instrumental	hṛdayyena	hṛdayyābhyām	hṛdayyaiḥ
Dative	hṛdayyāya	hṛdayyābhyām	hṛdayyebhyaḥ
Ablative	hṛdayyāt	hṛdayyābhyām	hṛdayyebhyaḥ
Genitive	hṛdayyasya	hṛdayyayoḥ	hṛdayyānām
Locative	hṛdayye	hṛdayyayoḥ	hṛdayyeṣu

Compound hṛdayya -

Adverb -hṛdayyam -hṛdayyāt