dredge

When a harbor becomes filled with silt, you dredge it to make it navigable again. You scoop out the mud with a big shovel, which is also called a dredge, and make a channel deep enough for ships.

Dredges have been at work in the Hudson River for years getting rid of industrial toxins, dredging up the contaminated sediment and loading it into barges to be carried away. If you've dropped your gold watch or your car rolled into a pond by mistake, there are dredges that can be dragged across the bottom to recover things that have fallen in. You can dredge up memories, too, which usually entails reminding people of unpleasant ones they’d rather forget.

Primary Meanings of dredge

1.
nv
a power shovel to remove material from a channel or riverbed
search (as the bottom of a body of water) for something valuable or lost
2.
v
cover before cooking
Full Definitions of dredge
1

n a power shovel to remove material from a channel or riverbed

Type of:
digger, excavator, power shovel, shovel
a machine for excavating

v search (as the bottom of a body of water) for something valuable or lost

Synonyms:
drag
Type of:
look for, search, seek
try to locate or discover, or try to establish the existence of

v remove with a power shovel, usually from a bottom of a body of water

Type of:
remove, take, take away, withdraw
remove something concrete, as by lifting, pushing, or taking off, or remove something abstract
2

v cover before cooking

dredge the chicken in flour before frying it”
Types:
flour
cover with flour
Type of:
coat, surface
put a coat on; cover the surface of; furnish with a surface

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