IPA: /ˌæn.ti.dɪˈmɒ.krə.tɪk/
KK: /ˌæntiˈdɛmɒkrætɪk/
Opposed to the principles and practices of democracy, often favoring authoritarian or dictatorial governance instead.
The new laws were seen as antidemocratic by many citizens who valued their voting rights.
Antidemocratic is formed from "anti-" (meaning against) and "democratic" (from Greek "demos" meaning people and "kratos" meaning power or rule). The word describes a stance or ideology that is against the rule or power of the people.
Think of 'against' ('anti-') the 'power of the people' ('democratic') — that's what antidemocratic means.