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"Cafeína" is a noun which is often translated as "caffeine", and "teína" is a noun which is often translated as "theine". Learn more about the difference between "cafeína" and "teína" below.
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
