The word "expertise" refers to a high level of skill, knowledge, or proficiency in a particular area or subject. It signifies that a person has extensive experience and is considered an authority in that field. For example, a scientist might have expertise in genetics, meaning they have a deep understanding and knowledge of that specific branch of biology.
The word "expertise" is derived from the French term "expertise," which means "expert’s judgment" or "skill." The root of the French word comes from the Latin word "expertus," meaning "experienced" or "proven."