IPA: /prɪˈkoʊʃəsli/
KK: /prɪˈkoʊʃəsli/
In a way that shows advanced development or maturity at an unusually early age.
The child spoke precociously, impressing everyone with her vocabulary.
Precociously → It is formed from "praeco" (from Latin, meaning early) and the suffix "-cious" (meaning full of or having the quality of). The word "precociously" means having the quality of being early, often referring to someone or something that develops or matures earlier than usual.
Think of 'early' ('praeco') and remember that 'precociously' describes someone or something that develops early.