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.
Designed to reliably operate in harsh usage environments and conditions.
Not neat or regular; irregular, uneven.
Rough with bristly hair; shaggy.
Violent; rude; boisterous
Having a rug or rugs.
Covered with a rug.
Stormy; turbulent; tempestuous
Harsh; grating; unpleasant sounding or looking
Rocky and bare of plantlife.
Broken into sharp or irregular points; uneven; not smooth; rough.
Harsh; austere; hard
Vigorous; robust; hardy
Sour; surly; frowning; wrinkled
Strong, sturdy, well-built.