αἰθήρ
aithḗr
“upper air, blazing sky”
5 words in English grow from this root.
Ethane
Scienceαἰθήρaithḗr
“of the blazing upper air”
Ether
Earthαἰθήρaithḗr
“the blazing upper air”
Ethyl
Scienceαἰθήρaithḗr
“ether-stuff”
Ethylene
Scienceαἰθήρaithḗr
“ether-stuff”
Polyethylene
Scienceπολύςpolús
“many ether-substance units”