C1 noun /nɒb/
Knob
门或抽屉上的圆形把手; 机器上的小圆形开关
Meaning
a rounded handle on a door or drawer; a small rounded switch on a machine
Example
He turned the brass knob to open the old wooden door.
他转动铜制的门把手,打开了那扇旧木门。