تقسيم الاستعارة باعتبار الجامع
Classification by the feature connecting the two terms.
الجامع أي ما قصد اشتراك الطرفين فيه
The common feature is that in which the two terms are intended to share.
Courage may connect a lion and a brave human; rapid movement through distance connects running and flying. Yet the fact that two things share a property does not show that the property belongs to the meaning of each concept.
This produces another distinction: the feature may be included within both concepts or not be included in that manner. Possessing a quality and containing that quality in a definition are not the same thing.