1. I 〔根と幹〕the root and the trunk
  1. II 〔物事の大本〕a basis ((複-ses)); the root
    • 彼らの政策の根幹を究明したかった
    • He wanted to study the basis [root] of their policy./He wanted to 「find out what their policy was based on [get to the bottom of their policy].