兆头
zhào tou · HSK 7
omen
🔮 兆 = omen/sign + 头 = noun-suffix head; so 兆头 is the head-marker of an omen
兆 carries the omen/sign meaning on its own; adding the suffix 头 (literally head, here just a noun-ender) makes the everyday word 兆头. Same 兆 shows up in 预兆 (forewarning) and 征兆 (symptom).
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'.