adj.防水的;
例句:
Is this roof completely watertight?
这屋顶一点也不漏 吗 ?
He will have our windows made watertight.
他要把我们的窗户做成不透水的.
The roof is not watertight and is like a sieve when it rains.
屋顶防雨性能不好,下雨时漏得像筛子.