VERB
使士氣低落;使失去信心;使泄氣
If something demoralizes someone, it makes them lose so much confidence in what they are doing that they want to give up.
例句
Clearly, one of the objectives is to demoralize the enemy troops in any way they can.
很明顯，目標之一就是要用一切可能的手段打擊敵軍的士氣。