superficiel

/sypɛʁfisjɛl/
1.
adjectivemasculine

shallow; superficial (of a person, attitude or treatment; lacking depth, serious thought, or sincerity)

Il est beau, mais il est superficiel : il ne pense qu'aux fringues.

He's handsome, but he's superficial — he only cares about clothes.

2.
adjectivemasculine

surface-level; not deep (physical or figurative: affecting only the surface or not thorough)

Ne fais pas un diagnostic superficiel, il faut creuser un peu.

Don't make a superficial diagnosis; you need to dig deeper.