emir

Emir comes from Middle French emir, borrowed from Ottoman Turkish emir, which came from Arabic ʔamīr, meaning "commander, prince."

The facts don't describe a shift in meaning — the sense of "commander, prince" appears to have carried through from Arabic into Ottoman Turkish, French, and English.

It's a doublet of amir, Amir, admiral, and amira, meaning they all descend from the same Arabic root even though they look and sound different now.