1. to stimulate, encourage, or increase someone's enthusiasm or passion for something
The coach's motivational speech fueled the team's enthusiasm for the upcoming championship.
O discurso motivacional do técnico alimentou o entusiasmo do time para o próximo campeonato.
2. to provide energy or inspiration that sustains excitement and motivation
Success fuels enthusiasm for new projects.
O sucesso alimenta o entusiasmo por novos projetos.