fagkyndig
Fagkyndig is a term used in Norwegian and Danish to describe a person who possesses specialized professional knowledge or qualifications in a particular field. As an adjective, it denotes competence in a subject area; as a noun, it can refer to a person with such expertise or to an expert witness in legal or official contexts (for example, a fagkyndig vitne in court).
Etymology traces the word to fag, meaning a field or subject, and kyndig or kunnig, meaning knowledgeable.
In practice, fagkyndig is commonly used in legal, regulatory, and professional settings to indicate the involvement
Fields in which the label is frequently applied include engineering, medicine, accounting and auditing, education, information