The word "autonomic" is an adjective that relates to the autonomic nervous system in our body. The autonomic nervous system is the part of our nervous system that controls things we do not think about, like breathing, heart rate, digestion, and other automatic functions.
In more advanced contexts, "autonomic" can refer to systems or processes in technology and computing that operate automatically or independently without human intervention.
While "autonomic" itself does not have specific idioms or phrasal verbs associated with it, you might encounter phrases like "on autopilot," which means to operate automatically without conscious thought, similar to how the autonomic nervous system works.
"Autonomic" is a helpful word for understanding how our body manages essential functions without our active involvement.