A Character's Element: Radical, Stroke Count and Meaning Each Say Something Different

Books of "five-element characters" look authoritative, but compare a few and you soon find the same character listed as Wood in one and Fire in another. The reason is that there is more than one way to assign an element. Checking the Unicode character data ourselves, we found that the radical school and the stroke-number school give the same element for only 19.5% of characters.

The radical school: look at the radical

A radical is the component a dictionary uses to file a character: 林 (lín, forest) is filed under 木 "tree," 清 (qīng, clear) under 水 "water," written as 氵 on the left side. Many radicals depict a physical thing, which makes this school the most intuitive. We only use the 16 radicals whose element every tradition agrees on. Others, such as 人 person, 心 heart, 言 speech or 糸 silk, are assigned differently by different books, so we do not judge them:

Variant forms count as the radical they come from: 氵 is water, 灬 is fire, the 王 on the left of jade characters is 玉 jade, 艹 is 艸 grass, 冫 is ice. Characters the radical school can judge make up 33.7% of the basic block.

The stroke-number school: the last digit of the Kangxi stroke count

The count has to be the Kangxi stroke count, the traditional count from the Kangxi Dictionary. It counts a radical as the full character it comes from, so 氵 counts as 水 with 4 strokes, 扌 as 手 "hand" with 4, 艹 as 艸 with 6, and the jade-side 王 as 玉 with 5. That is why 清 has 12 Kangxi strokes, more than the everyday count. This school shares its roots with the "three talents" of Chinese name numerology. Its strength is that it can judge every character; its weakness is that under another counting method, such as everyday stroke counts, the same character may land on a different element.

The meaning school: look at what the character means

晴 (qíng) is clear, sunny sky, so Fire; 涵 (hán) means to soak or immerse, so Water; 岳 (yuè) is a high mountain, so Earth. This school sits closest to the character itself but is also the most subjective: 明 (míng, bright) can be Fire because of its sun component, while some read it as Water because of its moon. We do not assign elements by meaning; the principle is to ask which substance or season the character's main image belongs to.

明 shows all three schools at once: its radical is 日 "sun," so the radical school says Fire; it has 8 Kangxi strokes, so the stroke-number school says Metal; the meaning school usually says Fire for sunlight, and sometimes Water for the moon.

How far apart are the two schools?

How we counted: using the radical data and Kangxi stroke counts in Unicode Unihan 16.0.0, we checked every character in the CJK Unified Ideographs basic block (U+4E00–9FFF). The radical school is applied only to the 16 radicals whose element every tradition agrees on.

Pure chance would give about 20% agreement, and the two schools do no better. In effect they are two independent sets of rules. The practical advice: pick one school and use it for the whole name. Do not choose characters with school A and then find fault with them using school B.

Common name characters for each element (radical school)

Every example character's radical was checked against the Unicode Unihan data. We list only the radical school because it has an objective basis; the same character may belong to another element under the stroke-number school, and the tool shows both.