Where does “plane” come from?

plane (Middle English) comes from Old French plane, from Latin platanus, from Greek πλάτανος, from Ancient Greek πλάτανος, from Ancient Greek πλατύς, from Proto-Indo-European pléth₂us, from Proto-Indo-European pleth₂- — flat.

Ancestry of “plane”, step by step

plane traces back through two separate lines of ancestry.

via Old French plane

Step	Language	Word	Meaning
1	Old French	plane	—
2	Latin	platanus	planetree, sycamore
3	Greek	πλάτανος	plane tree
4	Ancient Greek	πλάτανος	planetree
5	Ancient Greek	πλατύς	wide, broad; flat, level; broad-shouldered
6	Proto-Indo-European	pléth₂us	flat, broad
7	Proto-Indo-European	pleth₂-	flat

via Anglo-Norman plaine

Step	Language	Word	Meaning
1	Anglo-Norman	plaine	—
2	Latin	plāna	smoothing plane
3	Latin	plānus	level, flat, even
4	Ancient Greek	πλάνος	wandering
5	Ancient Greek	πλανάω	to make to wander, lead wandering about; to lead...
6	Proto-Indo-European	pl-néh₂-ti	—

Words derived from “plane”

Every word from Proto-Indo-European pleth₂- →