the quality of extending far down from the top or surface

the deepness of the ocean makes it difficult to recover debris

the quality of being intensely felt

the deepness and honest vulnerability of the lyrics

there's a deepness and richness to every relationship in the film

intensity or darkness of colour

I was blown away by the richness of the colours, the deepness of the blacks

the quality of being low in pitch and full in tone

there is a smooth deepness to the bass