Definition of rash

The word "rash" has a fascinating etymology. The term "rash" originates from the Old English word "hærs(e)", which referred to a sudden or impulsive action. Over time, the meaning of the word evolved to describe a sudden or hasty decision, a mad or foolish act, or even a sudden fit of anger. In the 17th century, the term "rash" began to be used to describe sudden skin eruptions or irritations, such as acne or eczema. This meaning is likely linked to the idea of something happening suddenly or without warning, much like a sudden outburst of anger or a rash decision. Today, the word "rash" has multiple meanings, including both the sudden skin irritations and the idea of acting impulsively or foolishly. Despite its versatility, the origins of the word remain rooted in the Old English concept of suddenness and hasty action.