brittle  
adjective uk/ˈbrɪt.əl/ us/ˈbrɪt̬.əl/
  (EASILY BROKEN)      
  易碎的,脆的
delicate and easily broken
  As you get older your bones become increasingly brittle. 随着年龄增长,人的骨头变得越来越脆。 
 The pond was covered in a brittle layer of ice. 池塘上结了薄薄的一层冰。 
   (UNKIND)      
 不友好的;冷淡的
unkind and unpleasant
  She gave a brittle laugh and turned away. 她冷笑了一声,转身走了。