| 溯 | [ sù ] to go upstream, to trace the source |
| 溯源 | [ sù yuán ] to investigate the origin of sth, to trace a river upstream back to its source |
| 溯溪 | [ sù xī ] river tracing, mountain stream climbing (recreational activity) |
| ⇒ 回溯 | [ huí sù ] to recall, to look back upon |
| ⇒ 尋根溯源 | [ xún gēn sù yuán ] see 追根溯源[zhui1 gen1 su4 yuan2] |
| ⇒ 推本溯源 | [ tuī běn sù yuán ] to go back to the source |
| ⇒ 推溯 | [ tuī sù ] to trace back to |
| ⇒ 追本溯源 | [ zhuī běn sù yuán ] to trace sth back to its origin |
| ⇒ 追根溯源 | [ zhuī gēn sù yuán ] to pursue sth back to its origins, to trace back to the source, to get to the bottom of sth |
| ⇒ 追溯 | [ zhuī sù ] lit. to go upstream, to trace sth back to, to date from |
| ⇒ 逆流溯源 | [ nì liú sù yuán ] to go back to the source |