Declension table of ?siddhāntatattvasarvasva

Neuter	Singular	Dual	Plural
Nominative	siddhāntatattvasarvasvam	siddhāntatattvasarvasve	siddhāntatattvasarvasvāni
Vocative	siddhāntatattvasarvasva	siddhāntatattvasarvasve	siddhāntatattvasarvasvāni
Accusative	siddhāntatattvasarvasvam	siddhāntatattvasarvasve	siddhāntatattvasarvasvāni
Instrumental	siddhāntatattvasarvasvena	siddhāntatattvasarvasvābhyām	siddhāntatattvasarvasvaiḥ
Dative	siddhāntatattvasarvasvāya	siddhāntatattvasarvasvābhyām	siddhāntatattvasarvasvebhyaḥ
Ablative	siddhāntatattvasarvasvāt	siddhāntatattvasarvasvābhyām	siddhāntatattvasarvasvebhyaḥ
Genitive	siddhāntatattvasarvasvasya	siddhāntatattvasarvasvayoḥ	siddhāntatattvasarvasvānām
Locative	siddhāntatattvasarvasve	siddhāntatattvasarvasvayoḥ	siddhāntatattvasarvasveṣu

Compound siddhāntatattvasarvasva -

Adverb -siddhāntatattvasarvasvam -siddhāntatattvasarvasvāt