The English Ambition comes from the Latin root ambi– (meaning “around”) plus the Latin verb ire (meaning “to go”): someone who goes around. Someone with ambition was, literally, someone who went around soliciting votes and support.
Ambiance also comes from the same root, ambi-: Ambiance is really what’s going around the place you’re in. That is, the environment.
The best part: the very common Spanish word meaning “both”, ambos, also comes from the same root, “around” — but only when there are two around.