字Study Chinese Characters
聿

yù writing brush

Component (a building block) — not the same thing as a radical or a sound component. · 6strokes

Characters that use it as a component

建律津

Characters filed under it as a radical

Kangxi radical no.129 · 6strokes — The 214 Kangxi radicals

Filed under it in a dictionary. That is a lookup convention — it does not mean it is the only part the character is built from.

肃