Declension table of ?mahāśiva

Masculine	Singular	Dual	Plural
Nominative	mahāśivaḥ	mahāśivau	mahāśivāḥ
Vocative	mahāśiva	mahāśivau	mahāśivāḥ
Accusative	mahāśivam	mahāśivau	mahāśivān
Instrumental	mahāśivena	mahāśivābhyām	mahāśivaiḥ mahāśivebhiḥ
Dative	mahāśivāya	mahāśivābhyām	mahāśivebhyaḥ
Ablative	mahāśivāt	mahāśivābhyām	mahāśivebhyaḥ
Genitive	mahāśivasya	mahāśivayoḥ	mahāśivānām
Locative	mahāśive	mahāśivayoḥ	mahāśiveṣu

Compound mahāśiva -

Adverb -mahāśivam -mahāśivāt