watertightness , also: water resistance

Also, the paint was designed to decrease water resistance.

And also, water resistance goes down with increasing height (see Froude number).

He tried to stay deep, where he knew that water resistance with the bottom would slightly slow its velocity.

We have an excellent ratio of sail to water resistance.

Its chief weakness was its weight and lack of water resistance.

It rained and the tents had lost their water resistance.

The ship features several new design innovations, including a type of paint that decreases water resistance.

But they lack the same water resistance as conventional plastics.

Pounding her feet against the water resistance, she quickly caught up with him.

If water resistance is not a factor in your vacation-reading decision, you'll want to go with size.