practitioner
https://gyazo.com/e66de781ecf41be6a6b0702c60368f07
source: By Docteur Ando - Own work, CC BY-SA 4.0
noun
a person actively engaged in an art, discipline, or profession, especially medicine:
(慣習などの)実践家; 実務家; 専門職従事者; 医者(medical practitioner)〘特に開業医; → general practitioner 〙; 弁護士
e.g. patients are treated by skilled practitioners.
ORIGIN
mid 16th century: extension of obsolete practitian, variant of practician.