📘 Radicals vs. Full Meaning
Every kanji has one official radical (部首), but a kanji’s full meaning usually comes from a combination of parts. In other words, the radical is used for classification—often classification by meaning—while additional components add sense or hint at pronunciation. Looking beyond the radical is the key to understanding how kanji communicate.
Example 1: 話(to speak)
Both parts point to speech: 言 means “speech,” and 舌 means “tongue.” Here the radical on the left clearly classifies by meaning (words/speech), while the right-side component reinforces the idea. Since 舌 sits on the right—traditionally a weaker position for radical assignment—it is not the radical in this character (though 舌 can be a radical elsewhere).
Example 2: 競う(to compete)
All three parts, two sets of them — 立, 口, and 儿 — contribute to the sense of rivalry or action. In fact, each of these components can serve as a radical in other kanji, and all are considered fairly strong radicals. Yet in 競, only 立 is officially recognized — historically because of its position (top-left) and its role in dictionary sorting. The lesson: the official radical isn’t always the “strongest” or most meaningful piece — it’s the one chosen for classification.
In practice, reading kanji is about combining signals: a radical that classifies (often by meaning), plus other components that add nuance or even hint at sound. Keep an eye on both: the radical for lookup and broad theme, and the other parts for the full picture.