👉 In the context of linguistics, "upsurge" can refer to a significant increase in population or activity due to external factors such as wars, revolutions, natural disasters, or changes in economic conditions. It is often used to describe a sudden and rapid growth in numbers, especially when it is accompanied by other positive changes or developments. For example: 1. In 2003, the United States experienced an "upsurge" of immigration from Central America due to the ongoing conflict
