Problem: Sentence1: I had to stay at home and watch the children.
Sentence2: After the trial period, she was asked to stay on and work full-time.
Q: Does the term stay mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: Use your head!
Sentence2: I can't use this tool.
Q: Does the term use mean the same thing in both these sentences?

Answer: the same meaning

Problem: Sentence1: Start a new job.
Sentence2: I start my day with a good breakfast.
Q: Does the term start mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: She knotted the end of the thread.
Sentence2: They rode to the end of the line.
Q: Does the term end mean the same thing in both these sentences?

Answer:
the same meaning