The phrase "have upper hand" implies having an advantage or a dominant position over others. Its antonyms include "at a disadvantage," "lower hand," "behind the curve," "inferior position," "on the losing side," and "underdog." These antonyms denote situations where an individual or group is on the weaker side of a power dynamic. Being at a disadvantage can be challenging, but it also presents opportunities for growth and learning. It is important to recognize when we are in these situations and find ways to overcome challenges, whether it be through perseverance, seeking help, or accepting our limitations. Ultimately, success is not defined by who has the upper hand but by how we respond to adversity.