The word "well-born" is used to describe individuals who are born into a high social status or an aristocratic family. Its antonyms correspond to words used to describe people with a low social status or no social status at all. These antonyms include words like "lowborn," "vulgar," "common," "plebeian," "uncultivated," "unrefined," "coarse," and "ignoble." These words are used to describe individuals who do not come from cultured or respected families and have a lack of education, refinement, or exposure to high society. The antonyms of "well-born" are often used to describe people who are regarded as inferior, uncivilized, or unworthy of respect.