Declension table of ?gūhya

Neuter	Singular	Dual	Plural
Nominative	gūhyam	gūhye	gūhyāni
Vocative	gūhya	gūhye	gūhyāni
Accusative	gūhyam	gūhye	gūhyāni
Instrumental	gūhyena	gūhyābhyām	gūhyaiḥ
Dative	gūhyāya	gūhyābhyām	gūhyebhyaḥ
Ablative	gūhyāt	gūhyābhyām	gūhyebhyaḥ
Genitive	gūhyasya	gūhyayoḥ	gūhyānām
Locative	gūhye	gūhyayoḥ	gūhyeṣu

Compound gūhya -

Adverb -gūhyam -gūhyāt