IPA: /ˌæntiˈstætɪst/
KK: /æntiˈstætɪst/
A person who is against government involvement in personal, social, or economic matters.
The antistatist argued that individuals should have the freedom to make their own choices without government interference.
Antistatist is formed from "anti-" (meaning against) and "statist" (from Latin "status", meaning state or condition). The word refers to someone who is against the state or government authority.
Think of 'against' ('anti-') the 'state' ('statist') — that's why an antistatist opposes state authority.