An operative person or thing.
Any of a class of behaviors that produce consequences by operating (i.e., acting) upon the environment.
That operates to produce an effect.
A hospital attendant given a variety of non-medical duties.
A soldier who carries out minor tasks for a superior officer.
Being on duty; keeping order; conveying orders.
Neat and tidy; possessing order.
Methodical or systematic.
Peaceful; well-behaved.