The phrase "do in to" can have various synonyms depending on the context in which it is used. It can mean to destroy, ruin, harm, defeat, or even deceive someone. If someone "does in to" another person, it could imply causing physical or emotional harm, causing someone to fail or lose, or even manipulating someone for personal gain. Alternative phrases to express the same idea could be "hurt," "injure," "damage," "outsmart," or "trick." It is important to use clear language and context when describing actions that may cause harm to individuals or their aspirations.