1. to increase speed or pace towards the conclusion of an activity, race, or task
The runner decided to speed up at the end of the marathon to cross the finish line stronger.
O corredor decidiu acelerar no final da maratona para cruzar a linha de chegada com mais força.
2. to work more quickly during the final stages of a project or process
We need to speed up at the end to meet the deadline.
Precisamos acelerar no final para cumprir o prazo.