English
clapper
From clap + -er.
A compound of clap + -er
Proto-Germanic *klappōną ‘to clap’
Proto-West Germanic *klappijan ‘to clap, strike or pound’
Old English clæppan ‘to throb’
Middle English clappen ‘to clap’
English clap
Today it means
noun One who claps; a person who applauds by clapping the hands.
Language periods are conventional ranges, not dates for this word.
Etymograph / clapper