| Subject | English | Japanese |
| gen. | get to the bottom of | 掘下げる (a matter) |
| gen. | get to the bottom of | 掘り下げる news2 nf45 (a matter) |
| gen. | get to the bottom of things | 剔る |
| gen. | get to the bottom of things | 刳る |
| gen. | get to the bottom of things | 抉る |
| gen. | take drastic measures to get to the bottom of something | メスを入れる |
| rel., budd. | using wisdom to get to the bottom of things | 思惟 esp. しい |