be left hanging (in the air/in midair)

To remain unresolved or unaddressed. I don't think he's very knowledgeable on this topic—my very basic question was left hanging in the air.

Name	Pronounced	Usage
Ingvildr	-	Ancient Scandinavian
Dorotheus	-	Late Roman
Bagot	['bægət]
Frederick	FRED-ə-rik, FRED-rik	English
Yoel	yo-EL (Jewish)	Hebrew, Biblical Hebrew
Salah Al-Din	-	Arabic