Assertion: warthog's tusk | /r/CapableOf | turn razor-sharp
Facets:
value: by rubbing against the upper tusks
type: MANNER
Source sentences:
text: The lower tusks, turned razor-sharp by rubbing against the upper tusks, are employed in defense against predators, as well as to dig up their often scarce food and water sources, by Common Warthogs as they roam alone or in groups.