キーストーンコンビネーション

noun

keystone combination

A loanword from English, used in contexts such as baseball or other sports to refer to a specific combination of players, often the second baseman and shortstop.

• 彼かれらは強きょう力りょくなキーストーンコンビネーションで知しられている。

  They are known for their strong keystone combination.