facade - front
The word ‘facade’ is used in two main ways, both related to the outer layer of something. Firstly, it describes the front of a building, particularly a large, important, or attractive one. Secondly, it can be used to express a deceptive outward appearance designed to hide the truth of something. In the latter sense, it is often used in a negative context.
The grand old building had an ornate, 17th-century facade that faced onto the street. It was a very impressive sight.
My wife and I tried our best to maintain the facade of a happy marriage, but in reality, things had disintegrated badly.
Anne’s cheerful demeanour is just a facade. She’s actually very calculating and ruthless.