Declension table of ?śairasa

Neuter	Singular	Dual	Plural
Nominative	śairasam	śairase	śairasāni
Vocative	śairasa	śairase	śairasāni
Accusative	śairasam	śairase	śairasāni
Instrumental	śairasena	śairasābhyām	śairasaiḥ
Dative	śairasāya	śairasābhyām	śairasebhyaḥ
Ablative	śairasāt	śairasābhyām	śairasebhyaḥ
Genitive	śairasasya	śairasayoḥ	śairasānām
Locative	śairase	śairasayoḥ	śairaseṣu

Compound śairasa -

Adverb -śairasam -śairasāt