Q: Sentence (1) Strike an arc.
Sentence (2) They were struck with fear.. Word: strike.
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A: different meanings

Q: Sentence (1) The line stretched clear around the corner.
Sentence (2) You must wait in a long line at the checkout counter.. Word: line.
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A: the same meaning

Q: Sentence (1) With the lights out, she had to rely on touch to find her desk.
Sentence (2) Only sight and touch enable us to locate objects in the space around us.. Word: touch.
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A:
the same meaning