Sentence:  Storm-clouds stretched their arms across the sky; from the east, to all appearances, might come a fierce <WSD>harmattan</WSD>, or from the south might come the fierce hurricane. 
Meaning of the word marked with <WSD> tags:  A dry and dusty wind which blows from the Sahara over the Atlantic coast of West Africa in December, January and February, being a hot wind in some areas and a cold wind in others.