التعقيد أي كون الكلام معقدا أن لا يكون الكلام ظاهر الدلالة على المراد
Taʿqid is when discourse does not clearly indicate its intended meaning.
The listener might understand each word and pronounce the sentence without difficulty, yet still struggle to recover the intended point. The problem is therefore the relation between expression and intended sense.
Convoluted pronouns, disrupted ordering or remote metaphorical transitions may make an expression unnecessarily obscure. This is distinct from the legitimate intellectual difficulty of a deep subject.