a.

1. 酸的，酸味的
   These oranges taste sour.

   這些橘子吃起來很酸。

2. 酸腐的，酸臭的
   The soup has gone sour.

   這湯發酸了。

3. 發酵的
4. 脾氣壞的，乖戾的；刻薄的
   It is said that the boss is sour toward his employees.

   據說這個老板對他的僱員很刻薄。

5. 【口】掃興的，令人失望的[F]
6. 討厭的；乏味的
   He hated being stuck in the sour job but couldn't find another.

   他討厭老是做這份枯燥乏味的工作，可是找不到別的差事。

7. 刺耳的；拙劣的
8. 敵對的，敵意的
   She gave me a sour look.

   她狠狠地瞪了我一眼。

9. 溼冷的，陰溼的
   We had a sour winter.

   我們過了一個濕冷的冬天。

vt.

1. 使變酸；使發酵
   The hot weather has soured the milk.

   炎熱的天氣使牛奶變酸了。

2. 使變得不愉快；使失望；使變得討厭無趣[（+on）]
   She was soured by his indifference.

   她因他的冷漠而變得不快。

vi.

1. 變酸；發酵
   The milk has soured in warm weather.

   牛奶在暖和的天氣裡發酸了。

2. 變得不愉快；厭煩
   Various adversity has soured her view of life.

   一連串的不幸使她的人生觀變得酸腐。

3. 變壞
   I don't know why his temper has soured.

   我不知道為什麼他的脾氣變壞了。

n.

1. 酸味[U]
2. 酸的東西[C]
3. 不愉快的事；苦事[the S]
4. 酸味酒[U][C]

adj.

1. having an acid taste like lemon or vinegar.
2. (of food, especially milk) having gone bad because of fermentation.
   ▸having a rancid smell.
3. showing resentment, disappointment, or anger.
4. (of soil) deficient in lime.
5. (of petroleum or natural gas) containing a high proportion of sulphur.

n.

v.