A historical terror.
It is debatable of what the definition of a witch is. Many could say it has to do with the devil. Witches are also commonly associated with old women as depicted in media.
The History of Witchcraft.
It is often believed that Witches have the power to cause diseases, flying, having animals that spy on people among others.
And since then, many were given permission to hunt down those who practice Witchcraft. People would often kill witches by burning them or were even thrown into water to prove their innocence.