وهو الاستعارة التي كان أصلها التشبيه
That is istiʿārah, whose foundation is simile.
In istiʿārah a word associated with one thing may be applied to another on the basis of a shared point of resemblance. The underlying comparison is retained conceptually, even when explicit comparative elements are omitted or recast.
Simile: “Zayd is brave like a lion” — the common quality of bravery is expressed as a comparison.
Metaphorical transfer: “I saw a lion on the battlefield” — the context identifies a brave soldier and excludes the actual animal.
Thus simile explains how metaphorical resemblance works, but not every simile is itself an istiʿārah.