languor /ˈlæŋɡə/

• 1. 

  N-UNCOUNT Languor is a pleasant feeling of being relaxed and not having any energy or interest in anything. 慵懒; 悠然 [文学性]

  例：

  How easy it is for even an energetic person to lapse into a pleasant languor.

  让一个即使精力充沛的人颓废到慵懒的状态是多么的容易。