English
linebacking
From line + backing.
Proto-Germanic *līną ‘flax’
Proto-Germanic *līnǭ ‘line’
Proto-West Germanic *līnā ‘line’
Old English līne ‘line’
Middle English line ‘rope’
English line
Today it means
noun Playing as a linebacker
Language periods are conventional ranges, not dates for this word.
Etymograph / linebacking