Unexplored ocean regions (6)
I believe the answer is:
depths
(Other definitions for depths that I've seen before include "Demoralisation" , "obscurities" , "lowest part" , "Deepest or most central parts" , "Profundities, seas (fig.)" .)
I believe the answer is:
depths
(Other definitions for depths that I've seen before include "Demoralisation" , "obscurities" , "lowest part" , "Deepest or most central parts" , "Profundities, seas (fig.)" .)