I used to live in a cold water flat when I was in college.

I used to live in a cold-water flat when I was in college.

Super heavy water is a hypothetical form of water with a higher density than regular water.

He is a talented water polo player.

I used to live in cold water flats when I was in college.

I feel in my water that something bad is going to happen.

The divers deep-water soloes into the ocean.

He deep-water soloed the cliff.

Deep-water solos are a thrilling form of rock climbing.

He enjoys deep-water soloing in his free time.