马克思主义 (Mǎkèsīzhǔyì): Marxism

马克思主义 is built on the surname 马克思 (Mǎkèsī, Karl Marx) plus 主义 (zhǔyì, '-ism'). It is one of the official guiding ideologies of the Chinese Communist Party, paired domestically with 毛泽东思想 (Mao Zedong Thought) and 中国特色社会主义 (Socialism with Chinese Characteristics).

memory

Same '-ism' suffix 主义 produces 资本主义 (capitalism), 社会主义 (socialism), 共产主义 (communism), 民族主义 (nationalism). 主 = primary, 义 = doctrine.