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Pronunciation varies by accent · noun
An excavation underneath something, or the excavation of a subgrade.
We were grading the road and found a soft spot where we did a sub-excavation.
Use sub-excavation when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Sub-excavation means An excavation underneath something, or the excavation of a subgrade.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
We were grading the road and found a soft spot where we did a sub-excavation.
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