dampness       
noun [ U ] uk/ˈdæmp.nəs/ us/ˈdæmp.nəs/ (UK also damp)
 (尤指令人不舒服的)湿,潮湿
the fact or state of being slightly wet, especially in a way that is not pleasant or comfortable
  It's the dampness in the air that is bad for your lungs. 空气中的湿气才会对你的肺部不利。 
 I felt the dampness on her clothes. 我感觉到她衣服上的湿气。 
 See: damp
 - More examples
 - At the moment my garage is unusable due to the constant dampness.
 - I could feel the dampness of the walls.
 - We wonder if there is some dampness or condensation in the room.