◎ 水泄不通 shuǐxiè-bùtōng
[be so jammed as to be impassable;be watertight that not even a drop of water could trickle through] 形容十分拥挤或围得非常严密
板棚里挤得水泄不通。——《筑路》
【解释】汇：排泄。象是连水也流不出去。形容拥挤或包围的非常严密。同“水泄不通”。