Out-playing is a term used to describe a situation where someone excels or performs better than another person in a specific activity or game. The antonyms for out-playing are underperforming, falling behind, lagging, trailing, and losing. In contrast to out-playing, these words imply a lack of competence or mastery in a particular area. Underperforming suggests that someone is not living up to expectations, while falling behind implies a failure to keep up with the competition. Lagging indicates a slow pace or progress, while trailing implies being left behind by others. Losing is perhaps the most straightforward antonym, suggesting that someone has failed to win or achieve their desired outcome.