CriterionOriginalDependent
ExpressionGeneric noun, literally or by interpretationVerb, derivative, particle, related forms
MechanismTransfer in the noun's meaning directlyTransfer through an underlying meaning or relation
Example“Lion” for a brave person“Spoke” of a situation
This is more than affixing a grammatical label. For a verb or derivative, the account of the metaphor traces the transfer through the meaning from which the form or relation is understood.