1246640 jmdict A [id=2147248] 掘り下げる[news2,nf45];掘りさげる;掘下げる ほりさげる[news2,nf45] [1][v1,vt] to dig down [2][v1,vt] to dig into (a matter); to delve into; to probe into; to investigate; to get to the bottom of