The word "注册" (zhùcè) is formed through a logical, visually-inspired combination of its two component characters. The first character, "注" (zhù), built from water ("氵") and a phonetic/marker for "to pour" or "concentrate", conceptually implies focusing attention or inscribing. The second, "册" (cè), is a pictograph of bamboo slips bound into a book or register. Therefore, the compound visually and conceptually synthesizes the action of "concentrating/inscribing one's information" directly "into an official record or ledger", perfectly capturing the idea of registration.