damper
US /ˈdæm.pɚ/
UK /ˈdæm.pɚ/

1.
regulador, compuerta
a plate or valve for controlling the flow of air or smoke, especially in the flue of a fireplace or furnace
:
•
Adjust the damper to control the airflow in the fireplace.
Ajusta el regulador para controlar el flujo de aire en la chimenea.
•
The furnace damper needs to be cleaned.
El regulador del horno necesita ser limpiado.
2.
freno, desmotivador
a person or thing that has a depressing, subduing, or inhibiting effect
:
•
The bad news put a real damper on our celebration.
Las malas noticias pusieron un verdadero freno a nuestra celebración.
•
His pessimistic attitude was a constant damper on the team's morale.
Su actitud pesimista era un constante freno para la moral del equipo.