English
lean-back
From lean + back.
Proto-Indo-European *ḱley-
Proto-Germanic *hlināną ‘to lean, incline’
Proto-West Germanic *hlinēn ‘to lean’
Old English hleonian ‘to lean, recline, lie down, rest’
Middle English lenen ‘to lean’
English lean
Proto-Germanic *baką ‘back’
Proto-West Germanic *bak
Old English bæc
Middle English bak ‘the back’
English back
Today it means
adj Enjoyed passively by the spectator, user, etc.
Language periods are conventional ranges, not dates for this word.
Etymograph / lean-back