The phrase "doth something about it" is an old-fashioned way of expressing action to resolve an issue. There are several synonyms for this phrase that can be used in modern times. Some of them include taking action, addressing the problem, tackling the situation, dealing with the matter, handling the issue, and resolving the concern. Each of these synonyms represents a proactive approach to problem-solving and suggests a sense of responsibility on the part of the person taking action. By using these synonyms instead of the antiquated expression "doth something about it," individuals can convey a more contemporary approach to addressing challenges in their lives.