C2 adjective /ˌsuː.pɚˈsɪl.i.əs/
supercilious
arrogant
Meaning
Behaving or looking as though one thinks one is superior to others; arrogant and disdainful.
Example
She gave him a supercilious smile as if he was beneath her.
Elle lui a fait un sourire arrogant comme s'il était en dessous d'elle.