quiescent

夜晚的森林一片寂静，没有一丝声响。

The forest was completely ___quiescent at night, with not a single sound to be heard.

这座休眠火山已经几个世纪没有喷发了。

The ___quiescent volcano hasn't erupted for centuries.

整个康复病房在下午的休息时段内一片沉寂——每位病人都一动不动地躺在薄毯下，唯一的声音是远处空调的低鸣。

The entire rehabilitation ward lay ___quiescent during the afternoon rest period — every patient motionless under thin blankets, the only sound the distant hum of an air conditioner.