The term "upper extremity" refers to the limbs of the human body located above the waist, including the arms and hands. Antonyms for this term may refer to the lower limbs, such as the legs and feet, or they may refer to non-limb areas of the body, such as the head, neck, or torso. Some possible antonyms for "upper extremity" include "lower extremity," "lower limb," "lower appendage," "head and torso," or "trunk and lower body." These terms are useful for describing anatomical structures and movements, and can be used to differentiate between different parts of the human body.