The word "arm-twist" refers to the act of using pressure or coercion to force someone to do something. Its antonyms would be words that convey the opposite meaning, such as encourage, persuade or convince. The antonyms suggest that the action being taken is voluntary and not forced, with the person acting willingly based on their own free will. Other antonyms for arm-twist include coax, cajole, and influence. These words imply that the person being persuaded is willing to take the desired action without any form of compulsion or coercion. Overall, the antonyms for arm-twist suggest a more positive, collaborative way of getting things done.