Where does “floatline” come from?

floatline (English) comes from English line, from Middle English line, from Old English līne, from Proto-West Germanic *līnā, from Proto-Germanic līnǭ, from Proto-Germanic līną, from Proto-Indo-European līno- — flax.

Ancestry of “floatline”, step by step

floatline traces back through two separate lines of ancestry.

via English line

StepLanguageWordMeaning
1EnglishlineA path through two or more points (compare ‘segment’); a continuous mark, including as made by a pen; any path, curved or straight
2Middle Englishlinerope, cord; line, rule, ruler, measure; rule,...
3Old Englishlīneline, rope, cord; line, cable, rope, hawser,...
4Proto-West Germanic*līnāline, chord, rope, string
5Proto-Germaniclīnǭthat which is made of flax; line, chord, rope,...
6Proto-Germaniclīnąflax
7Proto-Indo-Europeanlīno-flax

via English float

StepLanguageWordMeaning
1EnglishfloatOf an object or substance, to be supported by a...
2Middle EnglishfloteAlternative form of floute; Something that...
3Old Frenchflotefleet
4Old Norseflotifleet
5Proto-GermanicflutôA float; flotation device; A raft; boat; ship
6Proto-Indo-Europeanplewd-to fly, flow, run
7Proto-Indo-Europeanplew-to fly, flow, run
Every word from Proto-Indo-European līno-Every word from Proto-Germanic līnąEvery word from Proto-Germanic līnǭ