«أَمْعَنْتُ النَّظَرَ فِي تَوَسُّمِهِ وَسَرَّحْتُ الطَّرْفَ فِي مِيسَمِهِ»
I studied his features carefully and let my gaze search his identifying marks.
Tawassum refers to recognizing someone through appearance or signs; mīsam denotes a distinctive mark or feature. Amʿantu and sarraḥtu communicate sustained, searching attention.
The narrator has noticed an eloquence that feels familiar. His closer examination now seeks visible confirmation, so the eventual disclosure grows naturally out of the narrative rather than appearing as an arbitrary surprise.