IPA: /əˈfɪl.i.eɪ.tɪd/
KK: /əˈfɪl.i.eɪ.tɪd/
Connected or related to something else, often in a way that shows a partnership or support.
The organization is affiliated with several international charities.
To be officially connected or associated with a larger organization or group.
The university is affiliated with several research institutions.
Past: affiliated
Past Participle: affiliated
Affiliated is formed from "ad-" (meaning to, towards) and "filiare" (meaning to make a son or to adopt). The word describes the act of being connected or associated with an organization or group, as if being 'adopted' into it.
Think of being 'brought into' ('ad-') a family or group, like being 'adopted' ('filiare') — that's why affiliated means being connected or associated with something.