something that is disappointing because it is not as good as you expected it to be synonym disappointment, anticlimax令人失望的事;失望;沮丧 Afterwards there was just a feeling of let-down. 事情过后给人留下的只有一种沮丧的感觉。 The London exhibition was a bit of a let-down. 伦敦展览会有点令人失望。