“失败主义”常见的英文表达是 “defeatism”。它指的是一种在面对困难、挑战或不利局势时，持有一种消极、悲观，认为必然失败且放弃努力争取胜利的态度或观念。
例句：
We should avoid defeatism and keep fighting for our goals.（我们应该避免失败主义，继续为实现我们的目标而奋斗。）
His defeatist attitude is demoralizing the whole team.（他这种失败主义的态度让整个团队士气低落 。）