discourager

例句：

1. 1. The news of his success discouraged him from pursuing a career in science.
   他成功的消息让他失去了追求科学事业的勇气。
2. 2.The lack of funding discouraged the team from starting their project.
   资金不足让团队放弃了他们的项目。
3. 3. Her failure to meet the deadline discouraged her from trying again.
   她未能按时完成工作，这让她失去了再次尝试的信心。