Declension table of rahasya

Neuter	Singular	Dual	Plural
Nominative	rahasyam	rahasye	rahasyāni
Vocative	rahasya	rahasye	rahasyāni
Accusative	rahasyam	rahasye	rahasyāni
Instrumental	rahasyena	rahasyābhyām	rahasyaiḥ
Dative	rahasyāya	rahasyābhyām	rahasyebhyaḥ
Ablative	rahasyāt	rahasyābhyām	rahasyebhyaḥ
Genitive	rahasyasya	rahasyayoḥ	rahasyānām
Locative	rahasye	rahasyayoḥ	rahasyeṣu

Compound rahasya -

Adverb -rahasyam -rahasyāt