disappear vi. 消失，不見
[特徵]
- the boy disappeared in the dark.
這個男孩在黑暗中消失了。
[備考必背]
disappear是非延續性動詞，不能和表示一段時間的狀語連用。
（誤）the beast has disappeared for a long time.
（正）the beast disappeared a long time ago.
這隻野獸消失很久了。
disappoint vt. 使失望
[特徵]
- what you did disappointed me.
你的所作所為令我失望。
[備考必背]
①disappoint的過去分詞disappointed可以當作形容詞用，意思是“失望的”。disappointed, disappointing的用法和interested, interesting一樣。disappointed是“失望的，失意的”；disappointing是“令人失望的，掃興的”。
- i was disappointed that he had left.
我很失望他已經離開了。
- the weather was disappointing.
天氣叫人不痛快。
②派生詞：disappointmen n. 失望
- to their disappointment, the result was contrary to their expectation.
結果與預料恰好相反，這使他們感到失望。
discrimination n. 歧視
[特徵]
race discrimination 種族歧視
sex discrimination 性別歧視
- discrimination against women is not allowed.
不允許歧視婦女。
[貼心叮嚀]
discrimination特別指種族歧視或性別歧視等。
disease n. 疾病
[特徵]
- it is a terrible disease.
這是一種可怕的疾病。
- these are the diseases of society.
這些是社會弊端。
[貼心叮嚀]
disease原指所患的“疾病”，也引申為社會“弊端”。
[備考必背] 辨析disease和illness
disease指具體某種疾病，是一個專業性辭彙；illness指生病的狀態，是由disease引起的。
an occupational disease職業病 a disease of the eyes 眼病
- he can't go to school because of his illness.
他因為有病不能上學。