Declension table of ?dṛhya

Masculine	Singular	Dual	Plural
Nominative	dṛhyaḥ	dṛhyau	dṛhyāḥ
Vocative	dṛhya	dṛhyau	dṛhyāḥ
Accusative	dṛhyam	dṛhyau	dṛhyān
Instrumental	dṛhyeṇa	dṛhyābhyām	dṛhyaiḥ dṛhyebhiḥ
Dative	dṛhyāya	dṛhyābhyām	dṛhyebhyaḥ
Ablative	dṛhyāt	dṛhyābhyām	dṛhyebhyaḥ
Genitive	dṛhyasya	dṛhyayoḥ	dṛhyāṇām
Locative	dṛhye	dṛhyayoḥ	dṛhyeṣu

Compound dṛhya -

Adverb -dṛhyam -dṛhyāt