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"La huelga" is a form of "huelga", a noun which is often translated as "strike". "La líder" is a form of "líder", a noun which is often translated as "leader". Learn more about the difference between "la huelga" and "la líder" below.
la huelga(
wehl
-
gah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. strike
La huelga de los maestros cerró las escuelas una semana entera.The teacher strike closed down schools for a whole week.
el líder, la líder, líder(
lee
-
dehr
)This means that the noun can be masculine or feminine, depending on the gender of the noun it refers to (e.g., el doctor, la doctora).
An adjective is a word that describes a noun (e.g., the big dog).
2. (preeminent)