Definition of brighten

The word "brighten" has its roots in Old English. The verb "brighten" comes from the Old English word "brīhtan", which means "to make bright" or "to shine". This word is derived from the Proto-Germanic word "*brēhtiz", which is also the source of the Modern English word "bright". In Old English, "brīhtan" was used to describe making something shiny or radiant, such as cleaning or polishing metal surfaces or making fire burn more brightly. Over time, the meaning of the word expanded to include making something more cheerful or optimistic, such as brightening one's mood or outlook. Today, "brighten" is used in a variety of contexts, including both literal and figurative senses, such as brightening a room with lighting or brightening one's day with a positive event. Despite its evolution, the core meaning of the word remains tied to the idea of making something more radiant or shining.