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"La paz" is a form of "paz", a noun which is often translated as "peace". "La guerra" is a form of "guerra", a noun which is often translated as "war". Learn more about the difference between "la paz" and "la guerra" below.
la paz()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. peace
Europa disfrutaba de un periodo de paz y prosperidad en 1914.Europe was enjoying a period of peace and prosperity in 1914.
la guerra()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).