Declension table of ?śivarahasya

Neuter	Singular	Dual	Plural
Nominative	śivarahasyam	śivarahasye	śivarahasyāni
Vocative	śivarahasya	śivarahasye	śivarahasyāni
Accusative	śivarahasyam	śivarahasye	śivarahasyāni
Instrumental	śivarahasyena	śivarahasyābhyām	śivarahasyaiḥ
Dative	śivarahasyāya	śivarahasyābhyām	śivarahasyebhyaḥ
Ablative	śivarahasyāt	śivarahasyābhyām	śivarahasyebhyaḥ
Genitive	śivarahasyasya	śivarahasyayoḥ	śivarahasyānām
Locative	śivarahasye	śivarahasyayoḥ	śivarahasyeṣu

Compound śivarahasya -

Adverb -śivarahasyam -śivarahasyāt