shoal

The noun shoal can be used to refer to a group of fish or an area of shallow water. So when you’re navigating a shoal in your row boat, you might look down and see a shoal of fish swimming out of the way.

If you like to fish, you might know that shoal can refer to shallow water, but it can also describe a sandbank that you can only see when the water is low. Both kinds of shoals are problems if you’re trying to navigate in a boat — you have to try not to run aground when you encounter either one. The word also has a verb form that describes water that gets shallow: it shoals.

Definitions of shoal
1

n a stretch of shallow water

Synonyms:
shallow
Type of:
body of water, water
the part of the earth's surface covered with water (such as a river or lake or ocean)

n a sandbank in a stretch of water that is visible at low tide

Type of:
sandbank
a submerged bank of sand near a shore or in a river; can be exposed at low tide

n a large group of fish

Synonyms:
school
Type of:
animal group
a group of animals

v become shallow

Synonyms:
shallow
Type of:
change
undergo a change; become different in essence; losing one's or its original nature

v make shallow

Synonyms:
shallow
Type of:
alter, change, modify
cause to change; make different; cause a transformation

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