IPA: /ˌsuːpəˈfɪʃəl/
KK: /ˌsuːpərˈfɪʃəl/
Relating to or affecting the surface of something; not deep or serious; only concerned with what is obvious or apparent.
His understanding of the topic was superficial, lacking any real depth or insight.
Comparative: more superficial
Superlative: most superficial
Superficial → It is formed from "super-" (meaning above or over) and "facies" (meaning face or surface). The word "superficial" refers to something that is only on the surface or not deep, indicating a lack of depth in understanding or quality.
Think of something that is only 'above' ('super-') the surface ('facies') — that's why superficial means lacking depth.