Sentence:  Migraine headaches are fortunately suffered by a relatively small percentage of people, but for those who do suffer, <WSD>migraines</WSD> can literally take over their life. 
Meaning of the word marked with <WSD> tags:  A severe, disabling headache, usually affecting only one side of the head, and often accompanied by nausea, vomiting, photophobia and visual disturbances.