Unfold refers to the action of opening up or revealing, but what are the opposite words to describe when something is becoming tighter or is being closed up? These antonyms might include words like "fold," "compress," "contract," "conceal," "envelope," or "close." These words denote the idea of something becoming smaller or being hidden from sight. For example, instead of allowing a piece of paper to unfold, it may be folded tightly and kept compact. Similarly, rather than revealing something, one might conceal or envelope it. Antonyms can provide a helpful contrast to better understand and appreciate the shades of meaning in words like "unfold.