Where does “kaŭĉuko” come from?

kaŭĉuko (Esperanto) comes from French caoutchouc, from Spanish caucho, from Quechua kawchu.

kaŭĉuko (Esperanto): rubber

Definitions

Step	Language	Word	Meaning
1	French	caoutchouc	rubber
2	Spanish	caucho	rubber
3	Quechua	kawchu	—

kaŭĉuko — Etymology, Origin & Word History | Etymology Explorer