n.

1. 痒[S]
   I have an itch on my left hand.

   我左手很痒。

2. 【医】疥疮[the S]
3. 渴望；欲望[S][（+for）][+to-v]
   They have an itch to travel abroad.

   他们渴望去国外旅行。

vi.

1. 发痒
   I itch all over.

   我浑身发痒。

2. 渴望，热望[（+for）][+to-V]
   The boys were itching to let off their fireworks.

   男孩子们急着想放烟火。

vt.

1. 使发痒
   His wool shirt always itches him.

   他那件羊毛衫老是弄得他身上发痒。

2. 使烦恼；使恼怒
   His remarks itched her.

   他的话惹她生了气。

3. 【口】搔

n.

1. an uncomfortable sensation or condition that causes a desire to scratch the skin.
2. informal an impatient desire.

v.

1. be the site of or experience an itch.
2. informal feel an impatient desire to do something.