Declension table of ?dṛḍhadhur

Neuter	Singular	Dual	Plural
Nominative	dṛḍhadhūḥ	dṛḍhadhurī	dṛḍhadhuṃri
Vocative	dṛḍhadhūḥ	dṛḍhadhurī	dṛḍhadhuṃri
Accusative	dṛḍhadhūḥ	dṛḍhadhurī	dṛḍhadhuṃri
Instrumental	dṛḍhadhurā	dṛḍhadhūrbhyām	dṛḍhadhūrbhiḥ
Dative	dṛḍhadhure	dṛḍhadhūrbhyām	dṛḍhadhūrbhyaḥ
Ablative	dṛḍhadhuraḥ	dṛḍhadhūrbhyām	dṛḍhadhūrbhyaḥ
Genitive	dṛḍhadhuraḥ	dṛḍhadhuroḥ	dṛḍhadhurām
Locative	dṛḍhadhuri	dṛḍhadhuroḥ	dṛḍhadhūrṣu

Compound dṛḍhadhūr -

Adverb -dṛḍhadhūr