waterproof adj. 防水的，不透水的
例句：The corporation will come up with a new technique for waterproofing walls.
該公司將推出防止墻壁滲水的新技術。

watertight adj. 不漏水的，水密的
例句：As soon as the alarm went' the crew raced round shutting the watertight doors.
警報一響，船員們跑來跑去把船上的密封門關緊。

permeate vt. 彌漫，滲透，透過，充滿 vi. 透入
例句：The smell of cooking permeates through the flat.
整套房間都彌漫著做菜的氣味。

penetrate vt. 穿透，滲透，看穿，洞察 vi. 刺入，看穿，滲透，彌漫
例句：The sunshine could not penetrate where the trees were thickest.
陽光不能穿透樹木最濃密的地方。

drip n. 水滴 v. （使）滴下
例句：Moonlight dripped through the leaves.
月光透過樹葉灑下來。