Definition: to make someone less confident or make something weaker Level: C2
反复的失败会削弱一个人的自尊心。
Repeated failures can ___undermine a person's self-esteem.
不断的批评可能会打击团队的士气。
Constant criticism may ___undermine the team's morale.
泄露机密信息可能会严重危害国家安全。
Leaking confidential information could seriously ___undermine national security.
