Frightened means being very afraid or terrified due to a perceived danger, threat or risk. It is an emotion that can be triggered by various factors such as fear of heights, darkness, spiders, thunderstorms, ghosts, or any other stimulus that causes anxiety and discomfort. When someone is frightened, they may experience physical symptoms like rapid heartbeat, sweating, trembling, nausea, dizziness, shortness of breath, among others. The feeling can be overwhelming and paralyzing, making it difficult for the person to think clearly or act rationally.