This is the 4076th most frequent Spanish word.
dulce
Sweet.
Dulce is used as an adjective to describe the taste of the cake.
Este pastel es muy dulce.
This cake is very sweet.
Dulce functions as a noun here, referring to a type of sweet confection.
El dulce de leche es un postre típico.
The dulce de leche is a typical dessert.
Dulce is used metaphorically to describe the pleasantness of a voice.