frustrated

失意的，挫败的；泄气的英释中释adjsomeone who wants to develop a particular skill but has not been able to do this

挫败；阻挠（frustrate的过去式和过去分词形式）英释中释vIf someone or something frustrates a plan or attempt to do something, they prevent it from succeeding

1 He gets frustrated when people don’t understand what he’s trying to say..人们不懂他在说什么时，他就会很懊丧。

2 The government has deliberately frustrated his efforts to gain work permits for his foreign staff..政府蓄意挫败了他为其外国员工取得工作许可证的努力。