English
light line
From light (“lacking weight”, adjective) + line (noun).
Formed from light ‘lacking weight’ + line
Proto-Indo-European *lewk- ‘to shine’
…
Proto-Germanic *leuhtą
Proto-West Germanic *leuht ‘light’
Old English lēoht
Middle English light ‘light, illumination’
English light
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 The waterline at which a vessel floats when at light displacement; the light waterline.
Language periods are conventional ranges, not dates for this word.
Etymograph / light line