المركب قسمان: أحدهما المركب التام، وهو ما يصح السكوت عليه
Compound expressions are of two kinds. The first is complete compound speech: an utterance after which one may properly stop because the intended communicative meaning is complete.
“Zayd qāʾim”: Zayd is standing.
“Al-ʿālam ḥādith”: the world is originated.
Both make complete assertions. “One may stop” does not mean no further question could be asked; it means that the expression is not grammatically or semantically awaiting an essential completing member.