The word "hark" means to listen attentively or to pay close attention. It is often used as an imperative command to urge someone to listen carefully, especially to a sound or important message. Historically, it comes from Middle English, derived from Old English "heorcnian," meaning "to listen." The term is somewhat archaic but still used in literature, poetry, and formal or dramatic speech to draw attention to something important or to create a sense of urgency.