What is the root word of endeavor?

The root word of "endeavor" is "endeavor" itself. It's an old English word that has been around for centuries, and it doesn't seem to have a clear, traceable etymology to a simpler word.

However, the word "endeavor" is related to the Latin verb "advertere", meaning "to turn toward" or "to pay attention to." This connection suggests an original meaning of "to direct one's attention toward a goal," which aligns well with the modern meaning of "endeavor."