depths vs middle

depths

• The deepest part. (Usually of a body of water.) 

• The most severe or involved period. 

• The lowest point, all-time low, nadir. 

• A very remote part. 

middle

• The central part of a human body; the waist. 

• A centre, midpoint. 

• The part between the beginning and the end. 

• The middle stump. 

• The middle voice. 

• Pertaining to the middle voice. 

• Located in the middle; in between. 

• Central.