The group held weekly clandestine meetings in a church. 这个团体每星期都在教堂举行秘密集会。
He has been having a clandestine affair with his secretary for three years. 他和秘书私通已有3年了。
She undertook several clandestine operations for the CIA. 她执行过中央情报局的好几次秘密行动。
Synonyms: cloak-and-daggerhush-hush secret surreptitiousundercover underground