expert

EXPERT noun

[ C ] uk/ˈekspɜːt/ us
B1 someone who has a lot of skill in something or a lot of knowledge about something

специалист, эксперт
He's an expert on Japanese literature. Show me how to use this computer - You're the expert .
expert adjective [ always before noun ] uk/ˈekspɜːt/ us
B2 having a lot of skill in something or knowing a lot about something

квалифицированный
I need some expert advice on investments. What's your expert opinion? expert ly adverb

квалифицированно, со знанием дела
He carved the roast expert ly.