Aphotic and Cimmerian

Aphotic adjective - Lacking light; especially not reached by sunlight.

Cimmerian and aphotic are semantically related in lack of light topic. In some cases you can use "Cimmerian" instead an adjective "Aphotic".

Cimmerian adjective - Causing or marked by an atmosphere lacking in cheer.

Aphotic and cimmerian are semantically related in lack of light topic. Sometimes you can use "Aphotic" instead an adjective "Cimmerian".