bulk
US /bʌlk/
UK /bʌlk/

1.
mayor parte, volumen
the main part of something; the majority
:
•
The bulk of the work is done.
La mayor parte del trabajo está hecha.
•
The bulk of the population lives in cities.
La mayor parte de la población vive en ciudades.
2.
volumen, masa, tamaño
the size, mass, or volume of something
:
•
The sheer bulk of the package made it difficult to carry.
El gran volumen del paquete dificultaba su transporte.
•
Despite its small bulk, the device is very powerful.
A pesar de su pequeño volumen, el dispositivo es muy potente.
1.
aumentar volumen, engrosar
to make something larger or more substantial
:
•
He decided to bulk up by lifting weights.
Decidió aumentar su volumen levantando pesas.
•
The company needs to bulk up its inventory before the holiday season.
La empresa necesita aumentar su inventario antes de la temporada navideña.