IPA: /ˌæntɪˈmɒnəpəlɪst/
KK: /æntiˈmɒnəpəlɪst/
A person who is against monopolies and supports competition in the market.
The antimonopolist argued for fair competition to benefit consumers.
Antimonopolist → It is formed from "anti-" (meaning against) and "monopolist" (from Greek "monos" meaning single and "polein" meaning to sell). The word describes someone who is against monopolies or the control of a market by a single entity.
Think of someone who is 'against' ('anti-') a 'single seller' ('monopolist') — that's why an antimonopolist opposes monopolies.