The abbreviation "esp" stands for "especially." It is used to indicate that something is particularly significant or relevant within a broader context. When you use "esp," you are emphasizing a particular aspect or element that stands out from the rest.
The term "especially" derives from the Middle English word "especial," which comes from the Old French "especial" and ultimately from the Latin "specialis," meaning "particular" or "individual." The word has evolved over time to mean "in particular" or "to a significant degree."