Declension table of ?śivasva

Neuter	Singular	Dual	Plural
Nominative	śivasvam	śivasve	śivasvāni
Vocative	śivasva	śivasve	śivasvāni
Accusative	śivasvam	śivasve	śivasvāni
Instrumental	śivasvena	śivasvābhyām	śivasvaiḥ
Dative	śivasvāya	śivasvābhyām	śivasvebhyaḥ
Ablative	śivasvāt	śivasvābhyām	śivasvebhyaḥ
Genitive	śivasvasya	śivasvayoḥ	śivasvānām
Locative	śivasve	śivasvayoḥ	śivasveṣu

Compound śivasva -

Adverb -śivasvam -śivasvāt