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Pronunciation varies by accent · noun
(mining) A trench in solid rock intersected by pits which reveals mineral veins..
Use costean when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Costean means (mining) A trench in solid rock intersected by pits which reveals mineral veins..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use costean where its definition matches the intended context.
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