demotivate
verb [ T ] uk/ˌdiːˈməʊ.tɪ.veɪt/ us/ˌdiːˈmoʊ.t̬ə.veɪt/
使工作积极性下降，使变得消极
to make someone less enthusiastic about a job
She was very demotivated by being told she had little chance of being promoted. 当她被告知将来没有什么晋升机会后，她的上进心受到了严重的打击。