Declension table of ?harṣaka

Neuter	Singular	Dual	Plural
Nominative	harṣakam	harṣake	harṣakāṇi
Vocative	harṣaka	harṣake	harṣakāṇi
Accusative	harṣakam	harṣake	harṣakāṇi
Instrumental	harṣakeṇa	harṣakābhyām	harṣakaiḥ
Dative	harṣakāya	harṣakābhyām	harṣakebhyaḥ
Ablative	harṣakāt	harṣakābhyām	harṣakebhyaḥ
Genitive	harṣakasya	harṣakayoḥ	harṣakāṇām
Locative	harṣake	harṣakayoḥ	harṣakeṣu

Compound harṣaka -

Adverb -harṣakam -harṣakāt