Drainage
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 15:21的版本 （建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=drainage+etymology&newwindow=1&hl=en ref] Old English drēahnian, drēhnian ‘strain (l…”的新页面）
Old English drēahnian, drēhnian ‘strain (liquid’), of Germanic origin; related to dry.
wiktionary
drain + -age
etymonline
drainage (n.)
1650s, "act or process of draining," from drain (v.) + -age. Sense of "the water carried off by a system of rivers" is by 1860. Meaning "system by means of which something is drained" is by 1878.
