jar  
 noun [ C ] uk/dʒɑːr/ us/dʒɑːr/
  (CONTAINER)         
 B1 罐子,坛子;广口瓶
a glass or clay container with a wide opening at the top and sometimes a fitted lid, usually used for storing food
  a jar of coffee/pickled onions 一罐咖啡/腌洋葱 
 a jam jar 果酱罐子 
  UK informal一杯啤酒 
a drink of beer
  We often have a jar or two at the pub after work. 我们经常下班后到酒吧喝上一两杯啤酒。 
 - More examples
 - Would you put the jar back into the cupboard for me, please?
 - Can you get the lid off this jar?
 - I keep pennies and other small coins in a jar.
 - Screw the lid firmly on to the jar and shake well.
 - Turn the jar upside down and shake it.
 
  (SHAKE)      
 震摇;颠簸;撞击
a sudden forceful or unpleasant shake or movement
  With every jar of the carriage, the children shrieked with excitement. 车厢每剧烈震动一下,孩子们就兴奋地尖叫。 
 jar  
verb uk/dʒɑːr/ us/dʒɑːr/ -rr-
  (SHAKE)      
  [ I or T ]震动,(猛烈地)摇动 
to shake or move someone or something unpleasantly or violently
  The sudden movement jarred his injured ribs. 突然的一动震疼了他受伤的肋骨。 
   (NOT PLEASANT)      
  [ I or T ](使)感到不快;刺激(神经等) 
If a sight, sound, or experience jars, it is so different or unexpected that it has a strong and unpleasant effect on something or someone.
  The harsh colours jarred the eye. 这些强烈的色彩很刺眼。 
 A screech of brakes jarred the silence. 刺耳的刹车声打破了宁静。 
   (NOT RIGHT)      
 [ I ]冲突;不和谐,不一致 
to disagree or seem wrong or unsuitable
  This comment jars with the opinions we have heard expressed elsewhere. 这一评论和我们在其他地方听到的意见不一致。 
 Phrasal verb   
jar on someone (尤指噪声等)使(某人)不快
If something, especially a noise, jars on you, it annoys you.
  His superior manner jars on me. 他那高高在上的样子令我不快。 
 That squeaky voice is beginning to jar on me. 那尖细的说话声开始让我不舒服了。