Answer:
Ambulatory is derived from the dead language: Latin, ambulare.
Explanation:
We can track the word ambulatory to the mid 16th century (as a noun): from the Latin, <em><u>ambulatorius</u></em>.
Ambulatorius, though, also comes from another word from the same language. The word is: ambulare, which is a verb that means <em>‘to walk’.</em>
