打开
dǎkāi · HSK 1
open up
📂 打 = hit/strike + 开 = open → strike open, i.e. open up
打 (dǎ) is a generic action verb meaning hit or do; 开 (kāi) means open. Together they form the everyday verb for opening — a door, a box, a bottle, a file. The 打 here just activates the action, like English do or get.
打 — hand radical 扌 + nail 丁
打 combines the hand radical 扌 (action with the hand) with 丁 (originally a nail), suggesting striking or hitting with the hand. 丁 also serves as a phonetic hint in older readings. The meaning broadened from 'to strike' to a general verb for many hand-based actions, like 打电话 'make a phone call'.
开 — two hands 廾 + door 门 (open gate)
Originally written 開, showing two hands (廾) lifting the bar (一) off a gate (門) to open it. The simplified form 开 keeps the two-hands element and drops the gate. Core meaning 'to open' extended to 'start, operate, bloom'.