If you are deafeningly silent, you do not respond, or you stay silent when people expect you to speak or act.

In these professional areas, the reports are deafeningly silent.

On the subject of a fall in earnings, the CEOs have been deafeningly silent.

Shamefully, both leaders have been deafeningly silent on the issue.

Despite repeated requests for a response, the government has been deafeningly silent. 尽管一再被要求作出回应，但政府一直保持沉默。

I find it baffling that religious leaders, who should have so much to say on the subject, remain deafeningly silent.