HSK 7-9
开动
kāidòng动
to start; to set in motion; to move; to march
机器开动前必须检查线路。
Jī qì kāi dòng qián bì xū jiǎn chá xiàn lù.
The wiring must be checked before starting the machine.
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
Appears across levels (7-9) in the HSK 3.0 word list.