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No one had ever been able to get beyond its (Troy's) huge, soaring stone walls.
... go/climb beyond its huge and extremely high/tall stone walls.

Hi,
Does the second sound as good as the first and mean about the same? Thanks.
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No, the second does not sound good. 'Get' does not carry the restricted meanings of mode of access that your other words do.
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Mister Micawber.
No, the second does not sound good. 'Get' does not carry the restricted meanings of mode of access that your other words do.
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Thanks, Mister.

What about the "soaring" part? Is it the same as "extremely high/tall?" Thanks again.
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Yes, that's right.
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