secretive
adjective mainly disapproving uk/ˈsiː.krə.tɪv/ us/ˈsiː.krə.t̬ɪv/
遮遮掩掩的；守口如瓶的
People who are secretive hide their feelings, thoughts, intentions, and actions from other people.
He's being very secretive about his new girlfriend. 关于他的新女朋友他总是遮遮掩掩的。
Synonyms: close (SECRETIVE)tight-lipped
Compare: keep mum