Secrete
Tsunami's have a certain tendency to secrete things as they go back out to sea. When they bash themselves onto the land they just throw a bunch of sea water around, but there are only certain things that they'll secrete when they're leaving.
Certain tsunami secretions are dangerous. Can you think of any?
ひ, ひつ
None
None
Most tsunami's secrete heat (ひ). It takes a lot of energy for a tsunami to crash onto the land so the water is really really hot, and it has to secrete that heat as it's going back out to sea.
The next time someone asks you what does a tsunami secrete? You'll say heat!