Declension table of ?śabdarahasya

Neuter	Singular	Dual	Plural
Nominative	śabdarahasyam	śabdarahasye	śabdarahasyāni
Vocative	śabdarahasya	śabdarahasye	śabdarahasyāni
Accusative	śabdarahasyam	śabdarahasye	śabdarahasyāni
Instrumental	śabdarahasyena	śabdarahasyābhyām	śabdarahasyaiḥ
Dative	śabdarahasyāya	śabdarahasyābhyām	śabdarahasyebhyaḥ
Ablative	śabdarahasyāt	śabdarahasyābhyām	śabdarahasyebhyaḥ
Genitive	śabdarahasyasya	śabdarahasyayoḥ	śabdarahasyānām
Locative	śabdarahasye	śabdarahasyayoḥ	śabdarahasyeṣu

Compound śabdarahasya -

Adverb -śabdarahasyam -śabdarahasyāt