Assertion: mortar's shape | /r/HasProperty | familiar
Facets:
Source sentences:
text: Mortars—so called from their similarity of form to the mortar for pulverizing, which has retained its familiar shape from the earliest ages—are believed to have been the first guns used, and, though changed from age to age frequently in form of chamber, size, and projectile, all ages have found them too useful in their special way to suppress or essentially alter them.