I know what is mean by "dives into the water". It means you stand near the pool and you jump into the water keeping you head down.
Now I'm looking for a phrase for the following scenario (to describe the action in the bold).
Lets say you are swimming in the pool (in the water). Now your entire body is inside the water except your head. Now you go inside the water, I mean you entire body including the head goes inside the water. Is this action also called dive?
Still if you are not clear what I'm asking, read below.
You are in the water but you head is above the water surface. Now you go inside the water by getting your head inside the water. What is word to describe this action?