He tried to submerge his anger by going on a shopping spree.

submerge 由前缀 sub-（表示"在...之下"）和词根 merge（"浸入、融合"）组成，字面意思是"浸入水下"。在这里引申为"完全压抑、掩盖（情绪）"，就像把东西完全沉入水中一样。