Secretive (adjective) — كتوم ومُغلق ولا يُشارك معلوماته بسهولة: Inclined to hide feelings or information. Below are 7 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
Not revealing one's thoughts or feelings readily.
Slow to reveal feelings; kept for a particular use.
Near; shut; end; finish; intimate; careful; narrow; tight; private; complete
Cautious; wary; evasive; secretive; careful; guarded; circumspect
Attempting to avoid notice; secretive.
guardedtight-lipped