石头
shítou · HSK 3
rock
🪨 石头 = stone + head; 头 is a noun suffix like '-y' in stony
石 means stone or rock on its own. 头 (tóu) literally means head but often acts as a filler suffix on nouns (木头 wood, 骨头 bone). So 石头 is just the everyday word for a rock.
头 — 页 (head/page) + 豆 (bean, phonetic)
The traditional form 頭 combines 頁 (xié), meaning 'head', with 豆 (dòu) as the phonetic component. 頁 itself originally depicted a person with an emphasized head. The simplified form 头 is a modern shorthand that replaces 豆+頁 with a simpler shape while keeping the same meaning of 'head' or 'top'.