1. to suppress, reduce, or diminish someone's excitement or eagerness about something
The negative feedback seemed to quell the team's enthusiasm for the project.
O feedback negativo parecia abafar o entusiasmo da equipe pelo projeto.
2. to calm down or restrain passionate or excited feelings
Nothing could quell her enthusiasm for the new business venture.
Nada conseguia abafar seu entusiasmo pela nova empreita comercial.