discourage的动词形式是discourage。
例句
1.
The theory is that smoking should be stripped of any appeal to discourage new generations from starting in the first place.
该理论认为削弱吸烟的吸引力，从而劝阻下一代开始抽烟。
2.
Don't be discouraged by the first failure ─ try again!
不要因第一次失败就灰心丧气——再试一次吧！
3.
Learners can feel very discouraged if an exercise is too difficult.
如果练习太难，学习者就可能感到很没信心。
