The term "most strong-arm" refers to someone or something possessing physical strength or force. To describe the opposite, or antonyms, of "most strong-arm," one could use words such as feeble, weak, frail, delicate, or fragile. Antonyms like these suggest a lack of physical strength, as well as a potential for vulnerability or fragility. Additionally, words like gentle or peaceful may be used to describe the opposite of strong-arm, implying a lack of aggression or forcefulness. These antonyms provide a useful contrast to the term "most strong-arm" and help to paint a more nuanced picture of physical strength and power.