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"En" is a form of "en", a preposition which is often translated as "in". "El" is a form of "el", a definite article which is often translated as "the". Learn more about the difference between "en" and "el" below.
en(
ehn
)A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
el(
ehl
)A definite article is a word that identifies a noun as specific or known to the speaker (e.g., the girl).