undrain

名词 n. 动词 v.
中文释义

英文释义

名词 n.
  1. A water collection system that drains water away from a location.
    — The experiments with fresh and septic sludge show that for filters of the same size material, fresh sludge passes through into the undrains while septic sludge merely gives up its water.
动词 v.
  1. To restore that which has drained away.
    — The probable differences between gross and net drain also require an explanation of why some manpower "undrains" by returning home after a period of working in the United States.

词形变化

undrains present,singular,third-person undraining participle,present undrained participle,past undrained past undrains plural

词源

词源 1
From un- + drain.
词源 2
From un- + drain.
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