covert
adjective uk/ˈkəʊ.vɜːt/ us/ˈkoʊ.vɝːt/
隐蔽的；隐秘的；秘密的
hidden or secret
covert actions 秘密活动
The government was accused of covert military operations against the regime. 该政府被指责秘密组织推翻这一政权的军事行动。
Opposite: overt
covert
noun [ C ] uk/ˈkʌv.ət/ us/ˈkʌv.ɚt/
（尤指动物为躲避猎人而藏身的）丛林，小树丛
a group of bushes and small trees growing close together in which animals can hide, especially from people or other animals hunting them