1. to maintain or keep alive one's excitement, eagerness, or passion for something
She worked hard to preserve enthusiasm for her project despite the setbacks.
Ela trabalhou duro para preservar o entusiasmo pelo seu projeto apesar dos contratempos.
2. to prevent the loss or diminishment of enthusiasm
The team leader tried to preserve enthusiasm among the members during difficult times.
O líder da equipe tentou preservar o entusiasmo entre os membros durante tempos difíceis.