IPA: /ˌdɛlɪˈdʒɪtɪmeɪt/
KK: /dɛlɪˈdʒɪtɪmeɪt/
To take away the rightful status or authority from something or someone, making it not valid or acceptable.
The new law aims to delegitimate the previous agreements made by the council.
Past: delegitimated
Past Participle: delegitimated
Delegitimate → It is formed from "de-" (meaning down or away) and "legitimus" (meaning lawful or legitimate). The word refers to the act of removing or denying the lawful status of something.
Think of 'removing' ('de-') the 'lawful' status ('legitimus') of something — that's what delegitimate means.