IPA: /ˈlɪŋɡərɪŋli/
KK: /ˈlɪŋɡərɪŋli/
In a way that lasts longer than expected or is slow to end.
She looked at him lingeringly, as if she wanted to say something more.
Lingeringly → It is formed from "linger" (from Middle English *lingeren*, meaning to remain in a place longer than necessary) and the suffix "-ly" (meaning in a manner of). The word "lingeringly" describes the manner of remaining or staying longer than necessary.
Think of someone who stays in a place longer than they should — that's what lingeringly means, as it describes the manner of lingering.