Doziest is an adjective used to describe a state of being extremely sleepy or drowsy. Antonyms for doziest are words that describe the opposite of this state, such as alert, awake, energetic, lively, and vigorous. These words imply a state of being wide awake, active, and brimming with energy. The antonyms of doziest can also include words like animated, lively, peppy, and sprightly, which suggest liveliness, activity, and high spirits. By using these antonyms appropriately in a sentence, you can precisely communicate the opposite of doziest and convey a sense of alertness and energy in your writing or speech.