Dozing off, meaning to nod off or fall asleep, can have many antonyms depending on the context in which it is used. One possible antonym is "awake," which indicates that someone is alert and conscious. Other antonyms could include "energetic," "active," "vigilant," or "wide-awake." These words convey a sense of being fully aware and conscious, embodying the opposite of dozing off. In a more playful or whimsical context, antonyms for dozing off could include "bouncing," "dancing," "jumping," or "skipping," implying that the subject in question is full of energetic and dynamic movement, rather than nodding or drifting off to sleep.