expansion：张开，伸展；扩张，膨胀

词根词缀：ex-出 + -pans-延伸,扩展 + -ion

• ignominious
• ignominy
• ignoramus
• ignorance
• ignorant
• ignore
• iguana
• iguanodon
• ikebana
• ileum
• ilk
• ill
• illation
• illegal
• illegality
• illegalize
• illegible
• illegitimate
• ill-fated
• ill-founded
• ill humor
• illiberal
• illicit
• illiterate
• illness