Declension table of ?dṛḍhabuddhi

Masculine	Singular	Dual	Plural
Nominative	dṛḍhabuddhiḥ	dṛḍhabuddhī	dṛḍhabuddhayaḥ
Vocative	dṛḍhabuddhe	dṛḍhabuddhī	dṛḍhabuddhayaḥ
Accusative	dṛḍhabuddhim	dṛḍhabuddhī	dṛḍhabuddhīn
Instrumental	dṛḍhabuddhinā	dṛḍhabuddhibhyām	dṛḍhabuddhibhiḥ
Dative	dṛḍhabuddhaye	dṛḍhabuddhibhyām	dṛḍhabuddhibhyaḥ
Ablative	dṛḍhabuddheḥ	dṛḍhabuddhibhyām	dṛḍhabuddhibhyaḥ
Genitive	dṛḍhabuddheḥ	dṛḍhabuddhyoḥ	dṛḍhabuddhīnām
Locative	dṛḍhabuddhau	dṛḍhabuddhyoḥ	dṛḍhabuddhiṣu

Compound dṛḍhabuddhi -

Adverb -dṛḍhabuddhi