Component (a building block) — not the same thing as a radical or a sound component. · 5strokes
医矣知侯族疾矩矫
Kangxi radical no.111 · 5strokes — 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.
矢矣知矩矫