"troughs" in the noun sense
a narrow depression (as in the earth or between ocean waves or in the ocean bed)
2. gutter, trough
a channel along the eaves or on the roof collects and carries away rainwater
3. bowl, trough
a concave shape with an open top
4. public treasury, trough, till
a treasury for government funds
a long narrow shallow receptacle
6. manger, trough
a container (usually in a barn or stable) from which cattle or horses feed
Source: WordNet® (An amazing lexical database of English)
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