That operates to produce an effect.
Any of a class of behaviors that produce consequences by operating (i.e., acting) upon the environment.
An operative person or thing.
Having varied uses or many functions.
Capable of doing many things competently.
Being a switch; capable of taking either a dominant or a submissive role.
Changeable or inconstant.
Capable of taking either a penetrative (top) or receptive (bottom) role in anal sex.
Capable of moving freely in all directions.