This is the 13289th most frequent Spanish word.
pulmón
Lung.
The word 'pulmón' is used to refer to the organ responsible for respiratory functions in humans and animals.
El pulmón izquierdo es más pequeño que el derecho.
The left lung is smaller than the right one.
Here 'pulmón' is metaphorically used to signify an area that provides a breath of fresh air or vitality, often a green space in an urban setting.
El parque central es el pulmón verde de la ciudad.
The central park is the green lung of the city.
The word 'pulmones', plural for 'pulmón', is used again in relation to their function in breathing and oxygen intake during physical activities like diving.