ADJ-GRADED 一无所知的;一窍不通的 If you describe someone as clueless, you are showing your disapproval of the fact that they do not know anything about a particular subject or that they are incapable of doing a particular thing properly. 一无所知的;一窍不通的 [informal, disapproval]
I came into adult life clueless about a lot of things that most people take for granted. [+ about]
我已成年,却对许多大部分人认为理所当然的事情一窍不通。
We have found some drivers clueless as to the law.