operative

1 operative /ˈɑːpərətɪv/ adjective
1 operative
/ˈɑːpərətɪv/
adjective
Britannica Dictionary definition of OPERATIVE
1 
: ready for use : capable of being used
— opposite inoperative
2 
: most important
2 operative /ˈɑːpərətɪv/ noun
plural operatives
2 operative
/ˈɑːpərətɪv/
noun
plural operatives
Britannica Dictionary definition of OPERATIVE
[count]
1 
chiefly US : a person who does secret work for a government or political organization
2 
: a person who does work that involves using tools, operating machinery, etc.