The antonyms for the word "unconscious" include "conscious," "aware," "alert," "attentive," "responsive," and "awake." These words refer to a state of being fully aware of one's surroundings, thoughts, and actions. For instance, when you are conscious, you are fully awake and able to understand what is happening around you. On the other hand, when you are unconscious, you are unaware of your surroundings and cannot respond to stimuli. These opposites have significant implications in various fields, including medicine, psychology, and philosophy, where the concept of consciousness is a subject of much debate and discussion.