inborn
Existing in you from birth, not learned or taught.
Inborn means present from birth, built into you from the very start. When something is inborn, you don't have to learn it or develop it over time: it's simply part of who you are.
Some abilities appear to be inborn. Certain musicians seem to have an inborn sense of rhythm, hearing and feeling music in ways that come naturally to them. Some people have an inborn talent for math, seeing patterns and solutions almost instinctively. Babies have inborn reflexes like sucking and grasping that help them survive without any teaching.
But here's what makes this word interesting: it's often hard to tell what's truly inborn versus what develops so early we can't remember learning it. Is someone's kindness inborn, or did they learn it from loving caregivers before they could even talk? Are you naturally good at drawing, or did you start practicing so young that it feels inborn?
The word is closely related to innate, which means essentially the same thing. Scientists often debate which human traits are inborn and which are learned through experience. Most agree that while some basic abilities and tendencies are inborn, what you do with them, how you develop them, and who you become depends heavily on effort, practice, and choice.