Child genius is a term used to describe a young person with exceptional intelligence or abilities. However, there are many antonyms for the phrase "child genius" which express varying degrees of normalcy or lack of intellectual attainments.
Some antonyms for child genius include slow learner, struggling student, mediocre learner, average child, and underachiever. These terms indicate a child who is performing below the expected standards or is not as intellectually gifted as a child genius.
It is essential to understand that every child is unique, and intelligence cannot be solely defined by academic achievements or formal standardized tests. Therefore, it is best to celebrate each child's individual abilities and strengths rather than making comparisons.