永遠[eien] eternity
永久歯[eikyuushi] permanent tooth
永久性[eikyuusei] permanency
永久脱毛[eikyuudatsumou] removing hair permanently
永訣[eiketsu] last farewell

永劫[eigou] eternity
永小作[eikosaku] perpetual land lease
永子作権[eikosakuken] perpetual land lease
永寿[eiju] long life
永住[eijuu] permanent residence

お生憎様[oainikusama] that's too bad (ironical)
御誕生日おめでとうございます[otanjoubiomedetougozaimasu] Happy Birthday
隣の芝生は青い[tonarinoshibafuhaaoi] the grass is always greener on the other side
生きがいい[ikigaii] fresh (e.g. fish)
コンピューター援用生産[konpyuutaaenyouseisan] computer-aided manufacture

委託生[itakusei] scholarship student sent by government office or business
生す[nasu] to build up
異常発生[ijouhassei] plague
医学生[igakusei] medical student
医学生物学[igakuseibutsugaku] medical biology