English
lockhole
From lock + hole.
Proto-Indo-European *lewg- ‘to bend’
Proto-Germanic *luką
Proto-West Germanic *lok ‘shutter’
Old English loc
Middle English lok
English lock
Proto-Germanic *hulaz ‘hollow’
Proto-Germanic *hulą ‘hollow space’
Proto-West Germanic *hol ‘hollow space, cavity’
Old English hol ‘hole, hollow place’
Middle English hole
English hole
Today it means
noun A keyhole (hole for inserting and turning a key to unlock something).
Language periods are conventional ranges, not dates for this word.
Etymograph / lockhole