covertly
US /koʊˈvɝːt.li/
UK /ˈkəʊ.vɜːt.li/
副词
秘密地, 暗中地
without being openly acknowledged or displayed; secretly or surreptitiously
示例:
•
They worked covertly to gather intelligence.
他们秘密地工作以收集情报。
•
The company covertly monitored its employees' emails.
该公司秘密地监控员工的电子邮件。