Low-keyed is an adjective that is often used to describe something that is quiet, subdued, or modest. The antonyms for low-keyed are numerous and include loud, flamboyant, ostentatious, extravagant, bold, and showy. These words describe something that is the opposite of low-keyed, meaning it is attention-grabbing, attention-seeking, and over-the-top. For example, a low-keyed party might involve a few close friends, a quiet atmosphere, and simple decorations. In contrast, a loud and flamboyant party might involve bright lights, loud music, and extravagant decorations. The antonyms for low-keyed provide a range of options for describing things that are anything but quiet and subdued.