a.

1. 酸的，酸味的
   These oranges taste sour.

   这些橘子吃起来很酸。

2. 酸腐的，酸臭的
   The soup has gone sour.

   这汤发酸了。

   The soup has gone sour.

   这汤变得酸腐了。

3. 发酵的
4. 脾气坏的，乖戾的；刻薄的
   It is said that the boss is sour toward his employees.

   据说这个老板对他的雇员很刻薄。

5. 【口】扫兴的，令人失望的[F]
6. 讨厌的；乏味的
   He hated being stuck in the sour job but couldn't find another.

   他讨厌老是做这份枯燥乏味的工作，可是找不到别的差事。

7. 刺耳的；拙劣的
8. 敌对的，敌意的
   She gave me a sour look.

   她狠狠地瞪了我一眼。

9. 湿冷的，阴湿的
   We had a sour winter.

   我们过了一个湿冷的冬天。

vt.

1. 使变酸；使发酵
   The hot weather has soured the milk.

   炎热的天气使牛奶变酸了。

2. 使变得不愉快；使失望；使变得讨厌无趣[（+on）]
   She was soured by his indifference.

   她因他的冷漠而变得不快。

vi.

1. 变酸；发酵
   The milk has soured in warm weather.

   牛奶在暖和的天气里发酸了。

2. 变得不愉快；厌烦
   Various adversity has soured her view of life.

   一连串的不幸使她的人生观变得酸腐。

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

   我不知道为什么他的脾气变坏了。

n.

1. 酸味[U]
2. 酸的东西[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.