A scourge is something that causes widespread suffering or destruction. Historically, a scourge was a whip used for punishment, but today we use the word to describe serious problems that afflict many people.

When historians call a disease like polio the scourge of the 20th century, they mean it caused terrible harm to countless families before vaccines brought it under control. Locusts can become a scourge to farmers when massive swarms devour entire fields of crops. A drought might be described as the scourge of a farming community.

The word carries weight: you wouldn't call a minor annoyance a scourge. A mosquito buzzing around your room is irritating, but a mosquito-borne disease spreading through a region is a scourge. Teachers might joke about homework being the scourge of students everywhere, but they're exaggerating for effect, comparing a small frustration to something truly harmful.

As a verb, to scourge means to cause great harm or suffering, or to punish severely. When people work to eliminate a scourge, they're fighting against something that causes real damage: poverty, war, famine, or disease. The word reminds us that some problems are so serious they demand our attention and effort to overcome.