谣言正在暗中破坏公司的声誉。

The rumors are secretly ___undermining the company's reputation.

持续的消极言论正在逐渐削弱领导人的威信。

The constant negative comments are ___undermining the leader's authority.

持续的大雨正在侵蚀这座老房子的地基。

The constant heavy rain is ___undermining the foundation of this old house.