expert
— Adjective
– English
～ having or showing knowledge and skill and aptitude; "adept in handicrafts"; "an adept juggler"; "an expert job"; "a good mechanic"; "a practiced marksman"; "a proficient engineer"; "a lesser-known but no less skillful composer"; "the effect was achieved by skillful retouching"
expert
— Adjective
– English
～ of or relating to or requiring special knowledge to be understood; "technical terminology"; "a technical report"; "technical language"
economic expert
— Noun
– English
～ an expert in the science of economics
efficiency expert
— Noun
– English
～ an expert in increasing the efficient use of machines and personnel
escape expert
— Noun
– English
～ an entertainer who is expert in the art of escaping
expert
— Noun
– English
～ a person with special knowledge or ability who performs skillfully