What is the best definition for the word congenital?

The term "congenital" refers to a condition or trait that is present at birth, typically as a result of genetic factors. This aligns perfectly with the definition of "innate," which describes something that is natural or inherent to an individual from the very beginning. A congenital condition is not acquired later in life but rather is part of the person's original biology or genetic makeup.

In this context, while "contracted" suggests an illness or condition acquired through an external source, "lifelong" implies duration but does not address the origin or nature of the condition. The term "additional" simply connotes something that is extra or supplementary, which is unrelated to the idea of being present at birth. "Innate" captures the essence of congenital, making it the most accurate choice.