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"Hostilidades" is a form of "hostilidades", a plural noun which is often translated as "hostilities". "Preocupación" is a noun which is often translated as "concern". Learn more about the difference between "hostilidades" and "preocupación" below.
las hostilidades(
ohs
-
tee
-
lee
-
dah
-
dehs
)A plural noun indicates that there is more than one person, place, thing, or idea.
a. hostilities
El acuerdo entre ambas partes acabó con las hostilidades que se cobraron cientos de vidas.The agreement between the two sides put an end to the hostilities which had resulted in hundreds of people being killed.
la hostilidad
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. hostility
Miguel trata con hostilidad a su hermana por no invitarle a su boda.Miguel treats his sister with hostility because she didn't invite him to her wedding.
la preocupación(
preh
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oh
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koo
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pah
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syohn
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
1. (anxiety)
a. concern
Mi mayor preocupación ahora mismo es estudiar para el examen final.My biggest concern right now is studying for the final exam.
b. worry
Una de las preocupaciones de mi padre es que su negocio sufrirá este mes.One of my father's worries is that his business will suffer this month.
c. fear
La mayor preocupación del niño es que muera su madre.The boy's biggest fear is that his mother will die.