Not leave somebody’s side Definition 1 of 2Pro Tip 1/3Emotional Support Use when someone needs comfort or help and you're offering constant companionship. During his recovery, I did not leave his side. Pro Tip 2/3Not Literal The phrase often means moral support, not physically staying next to someone. Even when abroad, I will not leave your side. Pro Tip 3/3Close Bond Suggests a close relationship like friendship, family, or romance. She is my best friend; I can't leave her side in tough times.