Declension table of ?dṛḍhaprahāra

Masculine	Singular	Dual	Plural
Nominative	dṛḍhaprahāraḥ	dṛḍhaprahārau	dṛḍhaprahārāḥ
Vocative	dṛḍhaprahāra	dṛḍhaprahārau	dṛḍhaprahārāḥ
Accusative	dṛḍhaprahāram	dṛḍhaprahārau	dṛḍhaprahārān
Instrumental	dṛḍhaprahāreṇa	dṛḍhaprahārābhyām	dṛḍhaprahāraiḥ dṛḍhaprahārebhiḥ
Dative	dṛḍhaprahārāya	dṛḍhaprahārābhyām	dṛḍhaprahārebhyaḥ
Ablative	dṛḍhaprahārāt	dṛḍhaprahārābhyām	dṛḍhaprahārebhyaḥ
Genitive	dṛḍhaprahārasya	dṛḍhaprahārayoḥ	dṛḍhaprahārāṇām
Locative	dṛḍhaprahāre	dṛḍhaprahārayoḥ	dṛḍhaprahāreṣu

Compound dṛḍhaprahāra -

Adverb -dṛḍhaprahāram -dṛḍhaprahārāt