English
gumshield
From gum + shield.
Proto-Indo-European *ǵʰeh₂- ‘to gape, yawn’
Proto-Germanic *gaumô ‘palate’
Proto-West Germanic *gōmō
Old English gōma ‘palate’
Middle English gom
English gum
Proto-Indo-European *(s)kelH- ‘cut, split’
Proto-Germanic *skelduz
Proto-West Germanic *skeldu
Old English scield
Middle English scheld ‘a shield’
English shield
Today it means
noun A mouthguard to protect the teeth and gums during physical activity.
Language periods are conventional ranges, not dates for this word.
Etymograph / gumshield