微弱 (wēi ruò): yếu kém

Deep in the forest at night, only a faint light flickered in the distance, barely allowing him to see the path under his feet.

She had just recovered from a serious illness, and her voice was still very weak; she had to stop and catch her breath after saying just a few words.

After the earthquake, the person buried under the rubble used weak strength to knock on the pipe, hoping to attract the rescue workers' attention.

The patient lay in the hospital bed, breathing so weakly that it was almost inaudible; the doctor immediately decided to perform emergency treatment.

In this remote small town, the cell phone signal is very weak; we can only make a call after walking to the top of the hill.