透水 とうすい Meanings Noun permeation (e.g. of water); percolation; seepage Kanji 透 transparent. Read as トウ. 水 water. Read as スイ. Words containing 透水 透水性 (とうすいせい) permeability 透水層 (とうすいそう) permeable layer Jinuma: Japanese Dictionary · Word lists