undrain

词形变化

undrains 复数 undrains undrained undraining undrains 三单 undraining 现在分词 undrained 过去式 undrained 过去分词

释义与例句

n.
  1. 1.

    A water collection system that drains water away from a location.

v.
  1. 1.

    To restore that which has drained away.

词源

From un- + drain.

来源：wiktionary