English
lockpicker
From lock + picker.
Proto-Indo-European *lewg- ‘to bend’
Proto-Germanic *luką
Proto-West Germanic *lok ‘shutter’
Old English loc
Middle English lok
English lock
Proto-Germanic *pikkōną ‘to pick, peck, prick’
Proto-West Germanic *pikkōn ‘to peck, strike’
Old English *piccian
Middle English piken ‘to pick at’
Middle English piker ‘a robber or pickpocket’
English picker
Today it means
noun A person or device that lockpicks or picks locks.
Language periods are conventional ranges, not dates for this word.
Etymograph / lockpicker