| ★變形→im-,il-,ir- importv. 輸入;進口;意含 → port,to carry
 illuminate v. 照明,照亮;說明,闡釋(explain)
 → il-,in,lumin,light,opening
 illustrate v. 舉例說明(explain,illuminate);提出例證
 → il-,in;lustr,illuminate,clear
 illustrious   a. 著名的,顯著的(famous,distinguished,outstanding)
 → il-,in;lustr,clear
 irradiate v. 發出(emit),照射;發光(enlighten,radiate);啟發
 → ir-,on,toward;rad,root
 irrigate v. 灌溉(water);沖洗傷口;使潮濕
 → il-,in;rig,to water
 irrupt v. 突然衝入;突然增加 → erupt v. 爆發(outburst)
 → ir-,in;rupt,to break
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