dredge
DREJ
/drɛdʒ/
To scoop up, clear out, or deepen the bed of a river, harbor, or body of water using a specialized machine.
Implies underwater excavation, specifically removing mud, silt, or gravel from water floors.
The story behind the word. Traces back to Middle Dutch 'dregge' (a drag-net or grappling iron) and Middle English 'dregge'. Dutch sailors invented early scoop apparatuses to drag bottom silt out of busy shallow trading canals.
Word relationships
- scoop: 'Scoop' is a general term for picking material up, whereas 'dredge' specifically implies underwater silt clearing.
- desilt: 'Desilt' emphasizes removing silt specifically, while 'dredge' covers deepening water beds regardless of material.
Commonly confused with
- excavate: 'Dredge' is performed underwater on river/ocean beds, whereas 'excavate' is standard terrestrial digging.
Word family
- dredger (noun): A vessel or apparatus equipped for dredging underwater.
- dredging (noun): The act or process of clearing or deepening a body of water.
Collocations
- dredge a harbor
- dredge up sediment
- suction dredge
- dredge shipping channels
Idioms & expressions
- dredge up the past (bring up forgotten unpleasant memories)
Example sentences
- "Engineers had to dredge the shipping channel so that deep-draft cargo ships could dock safely." Port Operations
- "Crews prepared to dredge toxic sediment from the floor of the polluted industrial river channel." Environmental Management
Memory hook
DRAG + EDGE: DRAG a scoop along the underwater EDGE of a riverbed to DREDGE it. DRAG the bed to DREDGE the harbor.
When not to use
Do not use when excavating dry soil or cutting mountain trenches on land.
Fun facts
- Suction dredgers work like underwater vacuum cleaners, swallowing thousands of tons of sand and water per hour!
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