How to Write 溯 (sù) — Meaning “to go against the stream; to trace back”

Imagine you are 'sùing' (sounds like 'sue') upstream in a river: the left side is three drops of water (氵), and the right side is 朔, which you can think of as a 'reversed moon' (月 on bottom) carrying you backward. Picture a boat going against the flow under a crescent moon to recall the character.

Pay attention to the right side 朔: it has 月 (moon) as the bottom component, but the top is 屰 (nì, meaning 'reverse'), not 山 (mountain). A common mistake is to make the top part look like a mountain; instead, it is three strokes: a horizontal, a vertical, and a vertical hook in the middle, then a horizontal and a vertical—the whole is balanced. Also ensure the water radical on the left is written narrowly to leave room for the right side.

溯 (sù) means 'trace back' and has the water radical with 朔 on the right. 涪 (fú) is a place name (Fuling in China) and has 咅 (pǒu, a phonetic) on the right, looking like 立 plus 口. 涫 (guàn) means 'to boil' and has 官 (guān, official) on the right. Visually, 溯 has a distinct right part with 月 and a reversed top, while the others have simpler or different right-side components.

溯 is most often used in formal or written contexts, especially in the words 追溯 (zhuīsù) 'to trace back in history' and 溯源 (sùyuán) 'to trace to the source.' It appears in historical, philosophical, or scientific discussions about origins—for example, "追溯历史" (tracing history). Culturally, the idea of 'going upstream' connects to the Chinese idiom "溯流而上" (going against the current), which symbolizes effort and determination.

Common words containing 溯 include: 追溯 (zhuī sù) — to trace back to; 回溯 (huí sù) — To trace back; to recall.; 溯源 (sù yuán) — to trace to the source.