其れ故に[soreyueni] and so ...
何故なら[nazenara] because
何故ならば[nazenaraba] because
エンジン故障[enjinkoshou] engine failure
縁故[enko] relation

何故かと言うと[nazekatoiuto] because
旧故[kyuuko] antiquity
故い[furui] old (not person)
故老[korou] old people

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

愛郷[aikyou] love for one's hometown
愛郷心[aikyoushin] love of one's hometown
異郷[ikyou] strange land
家郷[kakyou] one's homeland
郷に入っては郷に従え[gouniittehagounishitagae] when in Rome, do as the Romans do

郷軍[gougun] veteran
郷愁[kyoushuu] nostalgia
郷土[kyoudo] native place
郷土小説[kyoudoshousetsu] local story
郷土料理[kyoudoryouri] local cuisine