English
shakeproof
From shake + -proof.
Formed from shake + -proof
Proto-Indo-European *skek- ‘to jump’
Proto-Germanic *skakaną ‘to shake, swing, escape’
Proto-West Germanic *skakan ‘to shake’
Old English sċacan ‘to pass or depart’
Middle English schaken ‘to rock or agitate’
English shake
Today it means
adj Of a washer: resistant to being loosened by vibration.
Language periods are conventional ranges, not dates for this word.
Etymograph / shakeproof