trough
//trɒf//
Noun
troughSingular
troughsPlural
1
A long, narrow open container used for feeding or watering animals.
The farmer filled the trough with fresh water for the horses.
2
A channel or conduit for conveying water or other liquids.
The water flows through the trough to the garden.
3
A long, narrow depression or hollow, especially between waves or ridges.
The small boat disappeared into the trough between the large waves.
4
A low point in a cycle or pattern, especially in economics or meteorology.
The economy is currently in a trough, but analysts expect a recovery soon.