Lowkey is a word used to describe a style or behavior that is relatively quiet, understated, or unassuming. Some antonyms for lowkey may include words like showy, flashy, bold, ostentatious, or flamboyant. These words all describe behavior that is more noticeable or attention-grabbing than something that is lowkey. Other antonyms could include words like assertive, aggressive, or confident, which imply a more forceful or outgoing personality. Whether you prefer a lowkey or high-energy approach to life, it is important to recognize that different situations call for different approaches, and to be able to adapt and adjust accordingly.