IPA: /ˌæntiˈpɪlɪkəl/
KK: /æntiˈpɪlɪkəl/
Describing a stance or attitude that is against or opposed to political activities or systems.
His antipolitical views made him reluctant to participate in the election.
Antipolitical is formed from "anti-" (meaning against) and "political" (from Greek "politikos", meaning of or relating to citizens or the state). The word describes a stance or attitude that is against political matters or politics.
Think of being 'against' ('anti-') anything related to 'citizens' or 'the state' ('political') — that's what antipolitical means.