expert

Derived from the Latin 'expertus', meaning 'experienced' or 'skilled'.

NOUN (1)

[/ˈɛk.spɜːrt/^en-US]

specialist formal / authority formal / master

Synonyms specialist formal , authority formal , master

Antonyms novice , beginner

A person who has a comprehensive and authoritative knowledge of or skill in a particular area. The term is derived from the Latin 'expertus', which means 'experienced' or 'skilled'.

The plural form is 'experts'.

plural
experts

She is an expert in marine biology. — 彼女は海洋生物学の専門家です。
The company consulted an expert to improve their marketing strategy. — その会社はマーケティング戦略を改善するために専門家を相談しました。

register: formal

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ADJ (1)

[/ˈɛk.spɜːrt/^en-US]

skilled / proficient / adept

Synonyms skilled , proficient , adept

Antonyms unskilled , incompetent

Having a high level of skill or knowledge in a particular area. This term often indicates that the person has gained experience and education in their field.

No irregular forms.

He is an expert programmer with years of experience. — 彼は数年の経験を持つ熟練したプログラマーです。
The chef is known for his expert cooking techniques. — シェフはその熟練した料理技術で知られています。

register: formal