Problem: Sentence1: Use the plastic bags to store the food.
Sentence2: He doesn't know how to use a computer.
Q: Does the term use mean the same thing in both these sentences?

Answer: the same meaning

Problem: Sentence1: Napoleon III was an echo of the mighty Emperor but an infinitely better man.
Sentence2: His contention contains more than an echo of Rousseau.
Q: Does the term echo mean the same thing in both these sentences?

Answer: the same meaning

Problem: Sentence1: Break a circuit.
Sentence2: Break a promise.
Q: Does the term break mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: This move will simplify our lives.
Sentence2: We had to simplify the instructions.
Q: Does the term simplify mean the same thing in both these sentences?

Answer:
the same meaning