operative
op-er-a-tive
noun
A secret agent or spy, especially one working for a government agency.
"The intelligence operative gathered crucial information."
adjective
Being in effect or working; functioning as intended or required.
"The new regulations become operative next week."
noun
A skilled worker, especially one involved in manufacturing or industrial processes.
"Factory operatives ensure smooth production lines."
Thesaurus
Synonyms: significant, important, preoperative, surgical, postoperative, intelligence officer, intelligence agent, secret agent, good, operational, operant, effective
Antonyms: inoperative, medical