汹
=
凶
+
氵
:
Xu Xian (xu) is surprised to find that when he pours water from a water bottle (氵) over a vicious demon mask (凶) lying on the floor in front of the engine ((e)ng1) the mask multiplies the water into a vicious torrent (汹).
涌
=
氵
+
甬
:
Yu the Great (yu) is playing a game inside of the engine ((e)ng3). She is submerging bottles of air (氵) under a Yongzhong bell (甬), which is under water. As she turns over the bell after accumulating a lot of air, many bubbles rush forth (涌).