Declension table of ?harṣayitavya

Neuter	Singular	Dual	Plural
Nominative	harṣayitavyam	harṣayitavye	harṣayitavyāni
Vocative	harṣayitavya	harṣayitavye	harṣayitavyāni
Accusative	harṣayitavyam	harṣayitavye	harṣayitavyāni
Instrumental	harṣayitavyena	harṣayitavyābhyām	harṣayitavyaiḥ
Dative	harṣayitavyāya	harṣayitavyābhyām	harṣayitavyebhyaḥ
Ablative	harṣayitavyāt	harṣayitavyābhyām	harṣayitavyebhyaḥ
Genitive	harṣayitavyasya	harṣayitavyayoḥ	harṣayitavyānām
Locative	harṣayitavye	harṣayitavyayoḥ	harṣayitavyeṣu

Compound harṣayitavya -

Adverb -harṣayitavyam -harṣayitavyāt