KEY: Operate.
SYN: Act, work, produce, effect, produce an effect, have effect.
ANT: Cease, rest, fail, misoperate.
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KEY: Operation.
SYN: Agency, action, exercise, production, influence, performance.
ANT: Cessation, inaction, rest, inoperativeness, inefficacy, inefficiency, misoperation.
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KEY: Operative.
SYN: Active, efficacious, serviceable, binding.