expansion：张开，伸展；扩张，膨胀

词根词缀：ex-出 + -pans-延伸,扩展 + -ion

• archipelago
• architect
• architecture
• architrave
• archive
• archives
• arctic
• Arctic
• arctic
• ardent
• arduous
• are
• area
• arena
• arena
• areola
• Ares
• Argentina
• argon
• Argonauts
• argot
• argue
• argus
• argus-eyed
• argy-bargy