Disappointed
“Disappointed” 来自 disappoint（使失望）。常见结构 be disappointed with/in/about。可因人、结果或自己而失望；比 upset 有时更克制，比 devastated 轻。
- “Fans were disappointed when the concert was canceled.” (演唱会取消时，歌迷很失望。)
- “I felt disappointed in myself for missing the deadline.” (我因错过截止日期而对自己失望。)
- “Her tone was polite, but he could tell she was disappointed.” (她的语气很客气，但他听得出她失望了。)
Disappoint 由 dis-（否定、相反）与 appoint（约定、期望）组合，本义为“使期望落空”。disappointed 为过去分词形容词。
dis- 表示否定或反转；appoint 与“指定、约定”相关。-ed 标记感受状态。
反馈场景里 “I’m disappointed” 可表达严肃不满，比 “I’m angry” 有时更具压迫感（视语气而定）。育儿与职场中常见。
- 固定搭配: “disappointed with” (对……失望), “disappointed in” (对……感到失望), “bitterly disappointed” (极度失望)
- 动词: disappoint；名词: disappointment
dis- + appoint：本来说好的 appoint 没了，所以 disappointed。
“The coach was disappointed, yet he told the team they had still improved a lot.” (教练很失望，但仍告诉队员们他们其实进步很大。)