湿地【しっち】
damp ground, wetland, bog, marsh
湿度【しつど】
level of humidity
湿気【しっけ】
moisture, humidity, dampness
湿っぽい【しめっぽい】
damp, humid, wet, gloomy, melancholy
多湿【たしつ】
high humidity
湿る【しめる】
to become damp, to become moist, to become wet, to lack energy, to be in a slump, to be in low spirits, to feel depressed