arise  
verb [ I ] uk/əˈraɪz/ us/əˈraɪz/ arose | arisen
  (HAPPEN)      
 C1 formal发生;产生;出现 
to happen
  Should the opportunity arise, I'd love to go to China. 要是有机会的话,我很想去中国。 
 Could you work on Saturday, should the need arise (= if it were to be necessary)? 万一有需要,你可以在星期六工作吗? 
 Are there any matters arising from (= caused by) the last meeting? 上次会议有没有引出什么问题? 
 - More examples
 - If any complications arise, let me know and I'll help.
 - Problems arise if the parents' approach to discipline is inconsistent.
 - An occasion may arise when you can use your knowledge of French.
 - An unforeseen difficulty has arisen.
 - His reputation for carelessness was established long before the latest problems arose.
 
  (GET UP)      
 literary起床 
to get out of bed
  We arose early on Christmas morning. 圣诞节早晨,我们早早地起了床。