1. To increase in strength, intensity, or determination towards the end of a race, competition, or endeavor
The runner managed to strengthen at the finish and win the race by a narrow margin.
O corredor conseguiu fortalecer na reta final e vencer a corrida por uma margem estreita.
2. To gain momentum or resolve in the final stages of an activity or project
The team strengthened at the finish to secure the championship.
O time se fortaleceu na reta final para garantir o campeonato.