WHOLE CHARACTER
头
the head; hair; a hairstyle; the top; the end; the beginning; first; chief; measure word for livestock
头 is the head: 点头 'nod', 头发 'hair', and the suffix -tou in 石头 and 骨头.
Taught as one written unit: the simplified 头 no longer shows the old pieces. ZDIC: 原为形声;从页、豆声 — the old form 頭 joined 页 (head) with 豆 (dòu) as sound; the modern shape keeps neither piece visibly. The suffix -tou use is described in the senses.