The phrase "base person" is often used to describe someone who is considered to be of low moral character or lacking in any form of integrity or decency. Some common synonyms for this term include "despicable", "dastardly", "vile", "disreputable", "dishonourable", "unprincipled", "unscrupulous", "sordid", and "infamous". These words are usually used to describe people who engage in behaviour that is unethical or immoral, such as lying, cheating, stealing, or committing other forms of wrongdoing. By using these synonyms, we can better describe people who are unpleasant and harmful to others, helping us to understand and address their negative behaviour.