Shallower

Little by little the water gets shallower.

The stream becomes shallower as you move upriver.

My experience of the world would be much shallower without the ability to communicate in lots of languages.

The farther you go upstream, the shallower the river becomes.

The pool is split into three parts: a deep part to swim in, a shallower one for kids, and a third one for hydromassages.

When dreaming begins, breathing becomes shallower and more irregular.

Lake Neusiedl is shallower than Lake Balaton.