What does "work at" mean? I'm also curious about how can I use this expression.
To "work at" something in this case means to work or try very hard at something by putting in effort to do something. This expression is normally used in any situation where someone is putting in effort to be improve or make something better. Ex: We just had a baby so we need to work at being good parents. Ex: She is working at being more polite. Ex: They are working at repairing their relationship.