Like the deepest parts of the ocean (4)
I believe the answer is:
dark
(Other definitions for dark that I've seen before include "Dismal" , "Lacking light" , "Unlit" , "With little or no light" , "Such an unknown horse" .)
I believe the answer is:
dark
(Other definitions for dark that I've seen before include "Dismal" , "Lacking light" , "Unlit" , "With little or no light" , "Such an unknown horse" .)