النَّسْخُ — الْإِغَارَةُ — الْإِلْمَامُ
Verbatim taking, recasting, and borrowing meaning.
In a constructed set of cases, presenting an entire earlier verse as one’s own points toward naskh/intihāl; substantially reshaping borrowed wording points toward ighārah/maskh; preserving a distinctive idea in new language points toward ilmām/salkh.
These labels remain conditional on proof of chronology and borrowing. Artistic improvement and evidence of taking material are separate issues: making a borrowed line better does not erase its origin.