English serum

← English suero (doublet)

← Spanish suero (cognate)

← French sérum (cognate)

← Proto-Indo-European *ser- (flow) (root)

← Italian siere (cognate)

← Italian siero (mention)

← Latin serum (derived)

← Portuguese soro (cognate)

→ English antiserum (prefix)

→ English suero (doublet)

→ English nonserum (prefix)

→ English serumless (suffix)

→ English serolin (mention)

→ English immunoserum (prefix)

→ English serumal (suffix)

→ English autoserum (prefix)

→ English serumuria (suffix)

→ Mauritian Creole serom (derived)

→ Portuguese soro (link)