Aphotic and Rayless

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

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

Rayless adjective - Being without light or without much light.

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