Declension table of ?dṛptha

Masculine	Singular	Dual	Plural
Nominative	dṛpthaḥ	dṛpthau	dṛpthāḥ
Vocative	dṛptha	dṛpthau	dṛpthāḥ
Accusative	dṛptham	dṛpthau	dṛpthān
Instrumental	dṛpthena	dṛpthābhyām	dṛpthaiḥ dṛpthebhiḥ
Dative	dṛpthāya	dṛpthābhyām	dṛpthebhyaḥ
Ablative	dṛpthāt	dṛpthābhyām	dṛpthebhyaḥ
Genitive	dṛpthasya	dṛpthayoḥ	dṛpthānām
Locative	dṛpthe	dṛpthayoḥ	dṛptheṣu

Compound dṛptha -

Adverb -dṛptham -dṛpthāt