IPA: /prəˈfɪʃənt/
KK: /prəˈfɪʃənt/
Having a high level of skill or knowledge in a particular area or subject.
She is proficient in three languages and can translate documents easily.
A person who is very skilled or knowledgeable in a particular area or subject.
She is a proficient in computer programming, able to solve complex problems quickly.
Proficient → It is formed from "pro-" (meaning in favor of or forward) and "facere" (meaning to do or make). The word "proficient" describes someone who is skilled or capable in doing something, indicating a forward or advanced ability in a particular area.
Think of someone who is 'doing' ('facere') something 'well' or 'in favor of' ('pro-') — that's why proficient means skilled or capable.