Secret (noun / adjective) — سر مكتوم أو معلومة مُخفية عن العلن: Something kept hidden from others; as an adjective, not known or seen by others. Below are 7 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
Private; secret; classified; restricted; privileged; exclusive; personal
privatehiddenclassifiedcovertmysteryundisclosed
Secret or hidden, especially for illicit or unauthorized purposes; kept concealed from public knowledge; covert operations conducted in secrecy
Supernatural or hidden from view; hidden knowledge.
Hidden, especially a hidden purpose.
Acting secretly, especially to gather information.
Beneath the ground; also secret; in Britain, an underground railway.