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/ˈɹiːtɑː(ɹ)k/ · noun
(geology, nuclear testing) A rubble mound occasionally formed by a powerful underground explosion (usually nuclear) in solid rock, due to the chimney of shattered rock above the explosion occupying a greater volume than the solid rock previously present..
Use retarc when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Retarc means (geology, nuclear testing) A rubble mound occasionally formed by a powerful underground explosion (usually nuclear) in solid rock, due to the chimney of shattered rock above the explosion occupying a greater volume than the solid rock previously present..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use retarc where its definition matches the intended context.
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