Sentence:  The <WSD>foehns</WSD> of the northern Alps are world-renowned for the formation of thermal belts on the alp terraces above the deep, U-shaped, glaciated valleys. Here the <WSD>foehn</WSD> phenomenon was first identified and the German word for "fall" or "descent" applied to it. 
Meaning of the word marked with <WSD> tags:  A warm dry wind blowing down the north sides of the Alps, especially in Switzerland.