As a Noun: 1. Something that makes you unwilling to do something because you are afraid of the consequences or because you have lost your enthusiasm. English = discouragement. As a Verb or Adjective: 1. To lose your enthusiasm or to become unwilling to do something. English = (be) discouraged. 2. To be sad because something you wanted has not happened or because it is not as good as you hoped it would be. English = (be) disappointed. Idiomatic English = (be) let down.