covertly
副词
UK/ˈkəʊ.vɜːt.li/
US/koʊˈvɝːt.li/
定义 covertly 副词
In a secret and hidden manner; not openly or publicly.
They were covertly conducting negotiations behind the scenes.
The intelligence operatives covertly gathered information about the organization.
He was covertly observing her reaction.