Declension table of ?harṣaka

Masculine	Singular	Dual	Plural
Nominative	harṣakaḥ	harṣakau	harṣakāḥ
Vocative	harṣaka	harṣakau	harṣakāḥ
Accusative	harṣakam	harṣakau	harṣakān
Instrumental	harṣakeṇa	harṣakābhyām	harṣakaiḥ harṣakebhiḥ
Dative	harṣakāya	harṣakābhyām	harṣakebhyaḥ
Ablative	harṣakāt	harṣakābhyām	harṣakebhyaḥ
Genitive	harṣakasya	harṣakayoḥ	harṣakāṇām
Locative	harṣake	harṣakayoḥ	harṣakeṣu

Compound harṣaka -

Adverb -harṣakam -harṣakāt