rude  
adjective uk/ruːd/ us/ruːd/
  (NOT POLITE)         
 B1 不礼貌的;粗鲁的,粗野的;讨厌的
not polite; offensive or embarrassing
  He's a very rude man. 他这人很粗鲁。 
 It's rude not to say "Thank you" when you are given something. 别人给你东西,你不说“谢谢”是不礼貌的。 
 He's got no manners - he's rude to everyone. 他这人很无礼——他对谁都很粗鲁。 
 B2 猥亵的;下流的;粗俗的
relating to sex or going to the toilet
  He told a rude joke/story. 他讲了个下流的笑话/故事。 
 - More examples
 - She made a rude gesture at the other driver.
 - You won't last long in your job if you carry on being so rude to the customers.
 - I've heard him be rude to her on a number of occasions.
 - You get the odd person who's rude to you but they're generally quite helpful.
 - I found him rude and uncooperative.
 
  (SUDDEN)      
  [ before noun ]突如其来的;突兀的;令人不知所措的;猛烈的 
sudden and unpleasant
  We had a rude awakening (= unpleasant shock) when we saw our phone bill. 看到我们的电话话费单时我们好像当头挨了一棒。 
   (SIMPLE)      
 old use or literary简单的;简陋的;粗制的 
simply and roughly made
  We built a rude shelter from rocks on the beach. 我们用石块在海滩上垒了一个简易棚。