易経[ekikyou] I Ching (Yi Jing) or The Book of Changes - one of the Five Classics
一切経[issaikyou] complete Buddhist scriptures
運動神経[undoushinkei] motor nerves
規模の経済[kibonokeizai] economies of scale
共同経営[kyoudoukeiei] joint management

経つ[tatsu] to pass
経る[heru] to pass
経緯[ikisatsu] details
経営[keiei] management
経営グループ[keieiguruupu] management group

行けない[ikenai] wrong
行る[yaru] to send
オリエント急行[orientokyuukou] Orient express
カ行[kagyou] classification for Japanese verb with the dictionary form ending in "ku"
ガ行[gagyou] classification for Japanese verb with the dictionary form ending in "gu"

サ行[sagyou] classification for Japanese verb with the dictionary form ending in "su"
ザ行[zagyou] classification for Japanese verb with the dictionary form ending in "zu"
スパイ行為[supaikoui] espionage
タ行[tagyou] classification for Japanese verb with the dictionary form ending in "tsu"
ダ行[dagyou] classification for Japanese verb with the dictionary form ending in "dzu"