An individual who lacks the ability to read or write is often referred to as an "illiterate person". However, there are several synonyms that can be used to describe such a person, including "uneducated", "ignorant", "unlettered", "unschooled", "benighted", "uninformed" and "unlearned". Each of these words conveys a slightly different aspect of illiteracy, ranging from a lack of formal education to a general lack of knowledge or awareness. Regardless of the specific synonym used, it is important to recognize that illiteracy remains a major barrier to social and economic progress for millions of people around the world, and efforts to combat it are essential for building stronger, more equitable societies.