Conk out is a phrasal verb that is used to describe when something or someone stops working suddenly or falls asleep unexpectedly. The antonyms, or opposites, of conk out would be words or phrases that describe the opposite actions or outcomes. Here are a few antonyms for the word conk out: remain active, stay alert, be productive, continue working, persist, persevere, stay awake, and energized. These antonyms are useful for expressing a state of stamina, productivity, and alertness as opposed to being lethargic, unproductive, or asleep. Using these antonyms can help create a more nuanced and varied vocabulary, making your writing or conversation more engaging and effective.