in a way that is not physically strong

"Please, get me some water," he said weakly. “求你了，给我拿点水，”他虚弱地说。

She smiled weakly at them. 她对他们虚弱地笑了笑。

in a way that is not strong in character, so that you are not able to make decisions or to persuade or lead other people

The prisons are too weakly governed to prevent high rates of violence. 监狱管理太软弱，无法防止频发的暴力。

They had weakly opposed the proposal. 他们并不强硬地反对该提议。

in a way that is not likely to be accepted or believed

He argued weakly that government funding was high enough. 他虚弱地辩称，政府的资助足够高了。

Her claims are only weakly supported by the evidence. 她的说法只有微弱的证据支持。