이후later time; the future 이내within; less than; not more than 이상or more; and over 이외the others; being other than 이하and below; and less 이남south 이래since 이북north 이실직고telling of the truth 이심전심mental communication; telepathy

전후before and after 목전before one's eyes 오전morning 오전반morning class 전past 전former 전전before last 전전before last 면전in front of somebody; in one's presence 사전being prior; being beforehand; being preliminary