Declension table of ?sivasa

Masculine	Singular	Dual	Plural
Nominative	sivasaḥ	sivasau	sivasāḥ
Vocative	sivasa	sivasau	sivasāḥ
Accusative	sivasam	sivasau	sivasān
Instrumental	sivasena	sivasābhyām	sivasaiḥ sivasebhiḥ
Dative	sivasāya	sivasābhyām	sivasebhyaḥ
Ablative	sivasāt	sivasābhyām	sivasebhyaḥ
Genitive	sivasasya	sivasayoḥ	sivasānām
Locative	sivase	sivasayoḥ	sivaseṣu

Compound sivasa -

Adverb -sivasam -sivasāt