Where does “Rusujo” come from?

Rusujo (Esperanto) comes from Esperanto -ujo, from German Etui, from French étui, from Middle French étui, from Old French estui — container, prison; case, sheath.

Ancestry of “Rusujo”, step by step

StepLanguageWordMeaning
1Esperanto-ujosomething filled with, a container or box for; a...
2GermanEtuicase, étui
3Frenchétuicase; holster; cover
4Middle Frenchétui—
5Old Frenchestuicontainer, prison; case, sheath
Every word from Old French estui →Every word from Esperanto -ujo →Every word from Middle French étui →