| insurmountable | adj,.無法克服的,難以突破的 =unbeatable=insuperable=overwhelming |
| integral | adj.必需的 =vital=important=fundamental |
| integrity | n.正直,廉正 =honor=uprightness=character |
| intelligible | adj.容易理解的,明瞭的 =lucid=comprehensible |
| intermittent | adj.不時被打斷的,間歇的 =sporadic=spasmodic=fitful |
| intrepid | adj.不畏懼的,勇猛的,大膽的 =brave=courageous=valiant |
| intriguing | adj.引起興趣的.激發好奇心的 =fascinating=enthralling=captivating |
| introvert | n.內向的人 =recluse=longer |
| intuitive | adj.直覺的,有直覺力的 =instinctive=instinctual |
| inundate | v.氾濫,湧向 =overwhelm=swamp=deluge |