precocious
/prɪˈkoʊʃəs/Definitions
1. adjective
developed or mature beyond one’s age, especially in mental or emotional development; showing an unusually early or rapid development of physical or mental abilities
“The child’s precocious talent for playing the piano was evident from an early age.”
2. noun
a person or animal that is developed or mature beyond their age
“The precocious child was reading adult novels at the age of ten.”