opaque
adj. (opp : transparent) 1 Gram. अपारदर्शी १ 2 Semant. अपारदर्शी २, अप्रकटार्थ ३ Logic (of context, which cannot delete without change in truth value-e.g. ‘I know that-the earth is round’ is an opaque context for ‘I believe that’ but not for ‘It is ture that’, also : referentially opaque) अपारदर्शी ३