One who does something habitually, such as a serial criminal offender.
A construction representing something done habitually.
Pertaining to an action performed customarily, ordinarily, or usually.
Of a person or thing: engaging in some behaviour as a habit or regularly.
Of or relating to a habit; established as a habit; performed over and over again; recurrent, recurring.
Regular or usual.
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.