Declension table of ?seru

Neuter	Singular	Dual	Plural
Nominative	seru	seruṇī	serūṇi
Vocative	seru	seruṇī	serūṇi
Accusative	seru	seruṇī	serūṇi
Instrumental	seruṇā	serubhyām	serubhiḥ
Dative	seruṇe	serubhyām	serubhyaḥ
Ablative	seruṇaḥ	serubhyām	serubhyaḥ
Genitive	seruṇaḥ	seruṇoḥ	serūṇām
Locative	seruṇi	seruṇoḥ	seruṣu

Compound seru -

Adverb -seru