/dɪˈklæsəˌfaɪ/ – verb
Definition: hủy bỏ quy chế mật của tài liệu, rút ra khỏi khu vực bảo mật.
A more thorough explanation: To declassify means to remove the classification or status of secrecy from a document or information, thereby making it available for public access or dissemination.
Example: The government decided to declassify the documents related to the investigation.