Where does “seaplane” come from?

I need to work through this chain carefully to write an accurate etymology sentence. Looking at the chain provided: - English sea | Latin planum | Latin planus | Ancient Greek πλάνος | Latin se | Proto-Indo-European sed- | Proto-Indo-European sed- | Proto-Indo-European pleth₂- However, there's a significant problem here: this chain doesn't make linguistic sense for "seaplane." The chain appears corrupted or incorrectly constructed. "Seaplane" is a compound of "sea" + "plane," where: - "sea" comes from Old English "sǽ" - "plane" (in the aircraft sense) comes from "aeroplane" The chain provided mixes unrelated etymologies and doesn't properly trace either component of "seaplane." Given the rules state "State only what the chain supports. Do not invent dates

seaplane (English): Any aircraft capable of taking off from, and...

Definitions

  1. Any aircraft capable of taking off from, and...

Ancestry of “seaplane”, step by step

seaplane traces back through two separate lines of ancestry.

via English plane

StepLanguageWordMeaning
1EnglishplaneOf a surface: flat or level; A level or flat...
2Middle Englishplane
3Old Frenchplane
4Latinplatanusplanetree, sycamore
5Greekπλάτανοςplane tree
6Ancient Greekπλάτανοςplanetree
7Ancient Greekπλατύςwide, broad; flat, level; broad-shouldered
8Proto-Indo-Europeanpléth₂usflat, broad
9Proto-Indo-Europeanpleth₂-flat

via English sea

StepLanguageWordMeaning
1EnglishseaA large body of salt water; A lake, especially if...
2Middle Englishseesea, ocean; A body of water, a lake; seat, chair
3Old Englishsea, lake
4Proto-West Germanicsaiwisea
5Proto-Germanicsaiwizsea, ocean
6Proto-Germanicsīhwanąto filter
7Proto-Indo-Europeanseykʷ-to moisten; to filter
8Proto-Indo-Europeansey-to be wet; dribble; run; to stretch one's arm;...

Words derived from “seaplane

Every word from Proto-Indo-European pleth₂-Every word from Proto-Indo-European pléth₂usEvery word from Ancient Greek πλατύς