The term 'knock hard' can be broken down into four crossword solutions: DECRY (5 letters), PAN (3 letters), RAP (3 letters), and SMITE (5 letters). DECRY means to express strong disapproval of something, PAN is a utensil used for cooking, RAP is a type of music, and SMITE is to strike with great force. Therefore, the term 'knock hard' can be interpreted as expressing strong disapproval, using a utensil to strike with great force, or making music with a forceful beat.