IPA: /ˈlɪərɪŋli/
KK: /ˈlɪrɪŋli/
In a way that shows a sly or lustful look, often with a sense of mockery or contempt.
He looked at her leeringly, making her feel uncomfortable.
Leeringly → It is formed from "leer" (from Middle English *leeren*, meaning to look with a sideways glance) and "-ingly" (a suffix used to form adverbs indicating manner). The word "leeringly" describes the manner of looking in a sly or lascivious way.
Imagine someone looking sideways with a sly expression — that's what 'leeringly' means, as it describes a way of looking that is suggestive or sneaky.