afiliación
affiliation
noun ah-fee-lyah-SYOHN Rare
Origin: From Late Latin affiliatio.
Also means
membership
Usage Note
Afiliación denotes formal membership in or connection to an organisation — afiliación sindical (union membership), afiliación política (political affiliation). In social security contexts afiliación a la Seguridad Social means registration as a contributor. The verb is afiliarse a.
Examples
"Su afiliación al sindicato fue voluntaria."
Natural Translation
His membership of the union was voluntary.

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