trough

(noun) a narrow depression (as in the earth or between ocean waves or in the ocean bed).

(noun) a channel along the eaves or on the roof; collects and carries away rainwater. Synonyms: gutter.

(noun) a concave shape with an open top. Synonyms: bowl.

(noun) a treasury for government funds. Synonyms: public treasury, till.

(noun) a long narrow shallow receptacle.

(noun) a container (usually in a barn or stable) from which cattle or horses feed. Synonyms: manger.