This is the 5102nd most frequent Korean word.
낮출
"낮출" means "to lower" or "to reduce."
Here, '낮출' is used to describe the act of reducing an intensity or level, in this case, volume.
그는 볼륨을 낮췄다.
He lowered the volume.
In this usage, '낮출' conveys the action of softening or decreasing the tone or volume of one's voice.
나는 목소리를 낮추어서 말했다.
I spoke in a lower voice.
Here, '낮출' refers to the aim of decreasing or reducing financial or quantitative metrics, such as costs.