also: プロフェショナル
na-adjective, noun
Used as both a noun and a na-adjective to describe someone or something that is professional, expert, or done with high skill and reliability.
彼はプロフェッショナルな態度で仕事に臨んだ。
He approached the work with a professional attitude.
あの選手は真のプロフェッショナルだ。
That athlete is a true professional.