Many people find him superficial because he only cares about appearances.

superficial 由前缀 super-（表示"在...之上"）和词根 ficial（来自拉丁语 facies，意为"表面"）组成，字面意思是"在表面之上的"，引申为"表面的、肤浅的"。这个词形容一个人只看重外表而不关注实质内容。