«ومنه أن يؤخذ بعض المعنى ويضاف إليه ما يحسنه»
“Another case is taking part of the meaning and adding something that beautifies it.”
Part of the earlier thought remains, but the later poet adds an attribute, consequence, reason or image. The addition counts as an improvement only if it substantively completes or enhances the effect; more words alone do not create a useful elaboration.
Method: Isolate the borrowed core, identify the added element, and explain what the addition actually contributes to the poem’s meaning.