IPA: /ˈɡlɪbli/
KK: /ɡlɪbli/
In a smooth and easy way, often without sincerity or depth.
He spoke glibly about the project, but I could tell he hadn't put much thought into it.
Glibly → It is formed from "glib" (of uncertain origin, possibly from Middle English "glibbe", meaning smooth or slippery) and the adverbial suffix "-ly" (meaning in a manner of). The word "glibly" means in a smooth or slippery manner, often implying superficiality or insincerity in speech.
Think of someone speaking in a 'smooth' way ('glib') — that's why 'glibly' means speaking smoothly, often without depth.