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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.
la cafeína(
kah
-
feh
-
ee
-
nah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
la teína(
teh
-
ee
-
nah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).