The phrase "most autonomic" refers to a system or process that functions automatically or without conscious thought. Antonyms for this phrase might include things that require conscious effort or intervention, such as deliberate actions or manual processes. Words like "manual," "controlled," "intentional," and "conscious" could all be considered opposites of "most autonomic." Additionally, concepts like "mindful," "thoughtful," and "attentive" might convey the opposite of something automatic or unconscious. While the term "most autonomic" might have a scientific connotation, its antonyms can be very human and relate to intentional decision-making and self-awareness.