Iʿtirāḍ (الاعتراض) inserts a meaningful parenthesis within the main flow of a statement. The inserted material is not a required constituent of the surrounding grammatical construction, yet it serves supplication, glorification, emphasis or warning.
The source cites «وَيَجْعَلُونَ لِلَّهِ الْبَنَاتِ سُبْحَانَهُ وَلَهُمْ مَا يَشْتَهُونَ» (Qurʾān 16:57). Subḥānahu (سبحانه) intervenes to proclaim God's transcendence amid the objectionable attribution.
The parenthesis is meaningful rather than incidental: it immediately rejects the unworthy implication while the surrounding statement continues.