Question: Sentence 1: Beat on the door.
Sentence 2: The sun was beating down on us.
Does beat mean the same thing in these two sentences?
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Answer: different meanings

Question: Sentence 1: The train backed into the station.
Sentence 2: The wind backed.
Does back mean the same thing in these two sentences?
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Answer: the same meaning

Question: Sentence 1: I couldn't tell what the thing was.
Sentence 2: To say the same thing in other terms.
Does thing mean the same thing in these two sentences?
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Answer:
different meanings