■ prudent 与 prudential

两个形容词都是“审慎”的意思，但是前者用于指人或行为，后者用于指精神领域的思考、计划。

• A prudent man will try to save money for family emergencies.审慎的人会设法积蓄以备家庭不时之需。
• It is always prudent to plan a trip carefully.出门旅行事先仔细计划一番，总是审慎之举。
• Prudential considerations often cause persons to watch out for their health.审慎的考虑，常常使得人们注意自己的健康。

• ingenious, ingenuity 与 ingenuous
• ingenuity
• ingenuous
• inhabit
• inhabitable
• inhabitable 与 habitable
• inhuman
• inhuman 与 unhuman
• initiative
• in itself
• injure
• injure 与 wound
• in luck
• in luck 与 lucky
• in one's own right
• in question
• inside
• insist
• inspire
• instead
• instead of
• instead 与 stead
• institute
• institution
• instruct