Using "brunch" as an example, what type of word formation does it represent?

The term "brunch" exemplifies a portmanteau because it is formed by blending two existing words: "breakfast" and "lunch." This process involves combining parts of both words to create a new term that conveys a specific meaning, which in this case refers to a meal eaten late in the morning that serves as both breakfast and lunch. Portmanteaus are a popular method of word formation, as they can succinctly express concepts or ideas by merging the sounds and meanings of the contributing words. The creation of "brunch" captures the essence of both meals while providing a creative and functional new term.