closed book
ریشه و کاربرد
ریشه
Derived from the adjective 'closed' and the noun 'book'.
مثال
- His past is a closed book.
- For me, physics is a closed book.
- She's a closed book, very secretive.
ترکیبهای رایج
Be a closed book Remain a closed book
تعریف انگلیسی
noun
- something that baffles understanding and cannot be explained “how it got out is a mystery” “it remains one of nature's secrets”