placidity
noun /pləˈsɪdəti/
  /pləˈsɪdəti/
[uncountable]- the quality in a person or an animal of not being easily excited or annoyed柔和度: 人或动物不易兴奋或烦恼的品质- Nothing could disturb her sweetness and placidity.没有什么能扰乱她的甜蜜和平静。 
 
- Nothing could disturb her sweetness and placidity.
- the fact of being calm and peaceful, with very little movement镇定与和平,几乎没有动静 - the placidity of the English countryside英国乡村的宁静 
 
- the placidity of the English countryside