pre ‧ co ‧ cious /prɪˈkəʊʃəs $ -ˈkoʊ-/ BrE AmE adjective
[ Date: 1600-1700 ; Language: Latin ; Origin: praecox 'becoming ripe early' , from coquere 'to cook, ripen' ]
a precocious child shows intelligence or skill at a very young age, or behaves in an adult way – sometimes used to show disapproval in British English:
a precocious child who walked and talked early
—precociously adverb
—precociousness ( also precocity ) /prɪˈkɒsəti, prɪˈkɒsɪti $ -ˈkɑː-/ noun [uncountable]