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"Antes de" is a preposition which is often translated as "before", and "diente" is a noun which is often translated as "tooth". Learn more about the difference between "antes de" and "diente" below.
antes de()
A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
el diente()
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).