IPA: /ˌsuːpəˈfɪʃəli/
KK: /ˌsuːpərˈfɪʃəli/
In a way that is not deep or thorough; only considering the surface or appearance of something.
The report only examined the issue superficially, without going into the underlying causes.
Superficially → It is formed from "super-" (meaning above or over) and "facies" (meaning face or appearance) combined with the suffix "-ly" (meaning in a manner). The word "superficially" means in a manner that relates to the surface or appearance rather than the deeper aspects.
Think of something that is 'above' ('super-') the 'face' or 'appearance' ('facies') of an object — that's why superficially means relating to the surface.