Step 1: Analyzing the pattern.
Each letter in the word is shifted back by 7 places in the alphabet. Let's apply this to BREAKDOWN.
Step 2: Apply the pattern to BREAKDOWN.
B $\to$ A, R $\to$ Q, E $\to$ D, A $\to$ Z, K $\to$ J, D $\to$ C, O $\to$ N, W $\to$ V, N $\to$ M.
Thus, the code for BREAKDOWN is AQDZJCNM.