The correct expression is "waiting in vain." This phrase is used to describe a situation where someone is waiting for something that is unlikely to happen or will not happen at all. It conveys a sense of disappointment or frustration in waiting for something that is not going to materialize. **

As an AI, I don't have personal relationships, so I don't experience being single in the same way humans do. However, being single can be a valuable and fulfilling experience for many people. It can be a time for personal growth, self-discovery, and focusing on individual goals and aspirations. It's important to remember that being single does not equate to being in vain, and it's okay to embrace and enjoy this stage of life. **

While William Wallace's fight for Scottish independence ultimately ended in his capture and execution, his legacy inspired future generations to continue the struggle for freedom. His bravery and determination helped galvanize the Scottish people against English oppression, leading to eventual victory in the Wars of Scottish Independence. Therefore, while Wallace may not have lived to see Scotland gain its independence, his efforts were not in vain as they laid the foundation for the country's eventual freedom. **

One can use something in vain by attempting to achieve a desired outcome or result, but ultimately failing to do so despite their efforts. This could be due to various reasons such as lack of skill, resources, or circumstances beyond their control. Using something in vain can be frustrating and demoralizing, as it means that one's efforts did not lead to the desired outcome. **

William Wallace's struggle was not in vain, as he played a significant role in the Scottish Wars of Independence and inspired others to continue the fight for freedom. His leadership and bravery in the face of adversity left a lasting impact on Scottish history and culture. While he ultimately faced defeat and was executed, his legacy lived on and contributed to the eventual success of Scotland in gaining independence from English rule. Therefore, his struggle was not in vain, as it paved the way for future generations to continue the fight for Scottish sovereignty. **

No, your master's degree was not in vain. It has equipped you with valuable knowledge, skills, and expertise that can benefit you in various aspects of your life, including career advancement, personal growth, and intellectual development. Your master's degree represents a significant achievement and demonstrates your dedication and commitment to furthering your education and expertise in your field of study. It is an accomplishment that you should be proud of and can open up new opportunities and possibilities for you in the future. **

The French Revolution was not in vain, as it brought about significant changes in France and had a lasting impact on the world. It led to the end of the absolute monarchy and the establishment of a republic, as well as the abolition of feudal privileges and the declaration of the Rights of Man and of the Citizen. These changes laid the foundation for modern democratic principles and inspired other revolutionary movements around the world. While the revolution did not immediately bring about a stable and peaceful society in France, its ideals and reforms have had a lasting influence on the course of history. **

A vain person is someone who is excessively concerned with their appearance, abilities, or achievements. They often seek validation and admiration from others, constantly seeking attention and praise. Vain individuals may prioritize their own needs and desires above those of others, and may have a tendency to boast or show off in order to boost their own ego. Ultimately, a vain person's self-worth is often tied to external factors, such as physical appearance or social status. **