to cavern out
- phrasal verb
- The engineers began to cavern out a new tunnel beneath the mountain.
Examples
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Workers used specialized equipment to cavern out storage spaces within the rock.
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Years of erosion gradually caverned out the limestone cliffs along the coast.
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They decided to cavern out the old mine.
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The workers are caverning out the hillside for the new tunnel.
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The engineers began to cavern out a new tunnel beneath the mountain.
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Workers used specialized equipment to cavern out storage spaces within the rock.
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They decided to cavern out the old mine to create more usable area.
Synonyms
To move through something by digging a hole or tunnel
To remove the inside of something to make an empty space
To dig a passage under something
Remove something that is under the ground or snow using a shovel
To make a hole by removing earth or rock
Remove the inside of something to leave an empty space
To make a deep cut or groove in a surface by scraping
To hollow rock by water or strong wind
To make a large empty space by hollowing rock or ground
How Deep
Surface Forms
Morphology
The meaning 'to hollow out deeply' is directly and compositionally derived from 'cavern' (to make a hollow) combined with the particle 'out' (indicating outward removal or completion). This verb+out pattern is productive in English (compare carve out, dig out, hollow out) and is cross-linguistically common, so a learner who knows the constituents would likely infer the MWE meaning.
Etymology
The verb cavern out creates a picture of workers cutting a large cavern into rock and pushing the rock out, leaving a deep empty space. So it means 'to hollow out' something deeply, as if making a cavern.