जो परिष्कृत न हो या जिसका परिष्कार न किया गया हो।

साहित्य में अपरिष्कृत भाषा का प्रयोग नहीं करना चाहिए।
अपरिष्कृत, अमार्जित, असंस्कृत

Lacking refinement or cultivation or taste.

He had coarse manners but a first-rate mind.
Behavior that branded him as common.
An untutored and uncouth human being.
An uncouth soldier--a real tough guy.
Appealing to the vulgar taste for violence.
The vulgar display of the newly rich.
coarse, common, rough-cut, uncouth, vulgar