Where does “flowtop” come from?

flowtop (English) comes from English flow, from Middle English flowen, from Old English flōwan, from Proto-West Germanic *flōan, from Proto-Germanic flōaną, from Proto-Indo-European plōw-, from Proto-Indo-European plew- — to fly, flow, run.

flowtop (English): The solid crust on a moving lava flow

Definitions

  1. The solid crust on a moving lava flow

Ancestry of “flowtop”, step by step

flowtop traces back through two separate lines of ancestry.

via English flow

StepLanguageWordMeaning
1EnglishflowA movement in people or things with a particular...
2Middle EnglishflowenTo flow, stream, or issue; to move; To become...
3Old Englishflōwanto flow
4Proto-West Germanic*flōanto flow
5Proto-Germanicflōanąto flow
6Proto-Indo-Europeanplōw-to flow, swim; to pour, wash
7Proto-Indo-Europeanplew-to fly, flow, run

via English top

StepLanguageWordMeaning
1EnglishtopThe highest or uppermost part of something; A...
2Middle EnglishtopThe summit or top of something, especially a...
3Old Englishtopptop, summit (of something)
4Proto-West Germanic*topptop, summit, crest
5Proto-Germanictuppaztuft, plait; top, summit
6Proto-Indo-Europeandumb-tail, rod, staff, pole, penis; tail, rod, staff,...
Every word from Proto-Indo-European plew-Every word from Proto-Indo-European plōw-Every word from Proto-Germanic flōaną