رَأَيْتُ أَسَدًا يَرْمِي
I saw a lion shooting arrows.
Taking the sentence as a literal report of an arrow-shooting lion clashes with the ordinary context. A brave person is intended; “asad” is borrowed for that person and “yarmī” excludes the ordinary animal reference.
The distinction between metaphor and metonymy does not rest merely on departing from literal meaning. It turns on the relation involved: resemblance favors metaphor, while a non-resemblance relation supports non-metaphorical figurative transfer.