ex·pan·sion·ist
noun/ɪkˈspænʃənɪst/
/ɪkˈspænʃənɪst/
(sometimes disapproving)- a person who believes that the size and importance of something should be increased, especially a country or a business
扩张主义；扩张政策 - He was a ruthless expansionist.
他是个残酷的扩张主义者。
- He was a ruthless expansionist.