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trough 
noun
- a narrow depression (as in the earth or between ocean waves or in the ocean bed)
- a channel along the eaves or on the roof; collects and carries away rainwater
Synonyms: gutter - a concave shape with an open top
Synonyms: bowl - a treasury for government funds
Synonyms: public treasury, till - a long narrow shallow receptacle
- a container (usually in a barn or stable) from which cattle or horses feed
Synonyms: manger
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