► 名詞単身赴任  [(5)たんしんふにん]    
meaning:  alone  rank: 3☆ 
彼は単身赴任した ⇨ He moved to a new workplace alone without moving his family  
(☛ A corporate employee to move to a new location a for temporary assignment without moving his family. Common in Japan for housing reasons, children’s education, etc.)