What is the meaning of Deepen?

To make deep or deeper

To make darker or more intense; to darken

To make more poignant or affecting; to increase in degree

To make lower in tone

To make more thorough or extensive.

To make more intimate.

To make more sound or heavy.

To become deeper

To become darker or more intense

To become lower in tone

To become more thorough or extensive.

To become more intimate.

To become more sound or heavy.

Source: wiktionary.org