The term "hole-and-corner" is often used to describe something that is secretive and hidden away from public view. Antonyms for this term might include transparent, open, overt, and upfront. If something is transparent, it is clearly visible and easy to understand, without hiding anything. If it is open, it is accessible and available to everyone, with no secrets. Overt means that something is obvious and visible, not hidden or secretive. Finally, upfront means that someone is honest and direct with their intentions, not trying to conceal anything. All of these terms are the opposite of the idea of being hole-and-corner.