Definition of fractious

The word "fractious" has its roots in the 14th century Latin word "fractus," meaning "broken" or "fractional." It was borrowed into Middle English as "fractious" and initially referred to something that was broken or divided into small pieces. Over time, the meaning of the word expanded to describe a person or thing that is apt to cause trouble or disturbance, often in a sudden and unpredictable way. This sense of the word is likely derived from the idea of something being "broken" or shattered, and is often used to describe someone who is argumentative, contentious, or prone to outbursts.