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"Agüero" is a form of "agüero", a noun which is often translated as "omen". "Símbolo" is a noun which is often translated as "symbol". Learn more about the difference between "agüero" and "símbolo" below.
el agüero()
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
el símbolo()
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).