adjective Date: 1759 marked by intimacy or willingness to confide , private , secret , entrusted with confidences , containing information whose unauthorized disclosure could be prejudicial to the national interest, ~ity noun ~ly adverb
CONFIDENTIAL
Meaning of CONFIDENTIAL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012