IPA: /ˈdiːp.nəs/
KK: /dipnəs/
The condition of being far down from the top or surface, or having a strong intensity or complexity.
The deepness of the ocean makes it difficult for divers to explore.
Deepness → It is formed from "deep" (from Old English "deop", meaning profound or intense) and "-ness" (a suffix used to form nouns indicating a state or quality). The word "deepness" refers to the state or quality of being deep or profound.
Think of the word 'deep' to remember that 'deepness' means the quality of being deep.