Declension table of ?hradaka

Neuter	Singular	Dual	Plural
Nominative	hradakam	hradake	hradakāni
Vocative	hradaka	hradake	hradakāni
Accusative	hradakam	hradake	hradakāni
Instrumental	hradakena	hradakābhyām	hradakaiḥ
Dative	hradakāya	hradakābhyām	hradakebhyaḥ
Ablative	hradakāt	hradakābhyām	hradakebhyaḥ
Genitive	hradakasya	hradakayoḥ	hradakānām
Locative	hradake	hradakayoḥ	hradakeṣu

Compound hradaka -

Adverb -hradakam -hradakāt