The phrase "get in one's hair" means to annoy or irritate someone. Its antonyms include living in harmony, being agreeable, and getting along. When people have an understanding, they tend to cooperate and respect each other's boundaries, which makes it less likely for someone to get in one's hair. Also, when individuals have an appreciation for each other's personality, skills, and values, they are less likely to engage in behaviors that stress or annoy the other person. Therefore, building positive relationships based on mutual respect and understanding can help reduce the likelihood of someone getting in one's hair.