How to Say "call-up" in Spanish
The Spanish word for “call-up” is “llamamiento” — B2 level.

Examples
La organización hizo un llamamiento a la calma.
The organization made an appeal for calm.
El presidente lanzó un llamamiento para ayudar a los refugiados.
The president launched a call to help the refugees.
Muchos jóvenes respondieron al llamamiento a filas.
Many young people responded to the call to arms.
Nouns ending in -miento
In Spanish, adding '-miento' to a verb is a common way to turn an action into a noun. For example, 'llamar' (to call) becomes 'llamamiento' (the act of calling or an appeal).
Always Masculine
Nouns that end in '-miento' are always masculine. You should always use 'el' or 'un' with this word.
Using 'llamada' instead
Mistake: “Hice una llamada a la paz.”
Correction: Hice un llamamiento a la paz. Use 'llamada' for a phone call or a short shout, and 'llamamiento' for a formal, public appeal.
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