/
ˈlaŋgə/
n.
  - tiredness or inactivity, especially when pleasurable.
 - an oppressive stillness of the air.
 
Derivative
- languorous adj.
  - languorously adv.
 
Etymology
ME (orig. in the sense ‘illness, distress’, later ‘faintness, lassitude’): via OFr. from L., from languere (see languish).