English
swingarm
From swing + arm.
Proto-Indo-European *swenk-
Proto-Germanic *swinganą ‘to swing’
Proto-West Germanic *swingan ‘to swing’
Old English swingan ‘to swinge, flog, beat, scourge’
Middle English swyngen ‘to flog, beat, or scourge’
English swing
Proto-Indo-European *h₂er- ‘to join’
…
Proto-Germanic *armaz
Proto-West Germanic *arm
Old English earm
Middle English arm
English arm
Today it means
noun The main component of the rear suspension of most modern motorcycles and ATVs; holds the rear axle in place while swinging vertically to allow the suspension to absorb the shock from bumps in the road.
Language periods are conventional ranges, not dates for this word.
Etymograph / swingarm