a sewer is a form of:

Sewer



noun
1.
(a drain for carrying away sewage) លូទឹកស្អុយ
ENGLISH MEANING
noun
1.
One who sews, or stitches.
2.
A small tortricid moth whose larva sews together the edges of a leaf by means of silk; as, the apple-leaf sewer (Phoxopteris nubeculana)
3.
A drain or passage to carry off water and filth under ground; a subterraneous channel, particularly in cities.
4.
Formerly, an upper servant, or household officer, who set on and removed the dishes at a feast, and who also brought water for the hands of the guests.