Q: Does the word "kill" mean the same thing in "Kill the engine." and "She was killed in the collision of three cars."?

A: different meanings

Q: Does the word "keep" mean the same thing in "Keep potatoes fresh." and "I can not keep track of all my employees."?

A: different meanings

Q: Does the word "study" mean the same thing in "He knocked lightly on the closed door of the study." and "He is a quick study."?

A: different meanings

Q: Does the word "echo" mean the same thing in "Napoleon III was an echo of the mighty Emperor but an infinitely better man." and "His contention contains more than an echo of Rousseau."?

A:
the same meaning