Question: "sign" used in the same way in the following two sentences?

Those clouds show little sign of raining soon.

He showed signs of strain.
Answer: the same meaning
Question: "allow" used in the same way in the following two sentences?

To allow a servant his liberty.

Mandela was allowed few visitors in prison.
Answer: different meanings
Question: "block" used in the same way in the following two sentences?

Block a nerve.

Block a garment.
Answer: different meanings
Question: "extend" used in the same way in the following two sentences?

Extend the casserole with a little rice.

Extend the TV antenna.
Answer:
different meanings