Declension table of ?sīsa

Masculine	Singular	Dual	Plural
Nominative	sīsaḥ	sīsau	sīsāḥ
Vocative	sīsa	sīsau	sīsāḥ
Accusative	sīsam	sīsau	sīsān
Instrumental	sīsena	sīsābhyām	sīsaiḥ sīsebhiḥ
Dative	sīsāya	sīsābhyām	sīsebhyaḥ
Ablative	sīsāt	sīsābhyām	sīsebhyaḥ
Genitive	sīsasya	sīsayoḥ	sīsānām
Locative	sīse	sīsayoḥ	sīseṣu

Compound sīsa -

Adverb -sīsam -sīsāt