clever, smart
Ich werde überhaupt nicht schlau aus dem, was du sagst.
I don't understand what you're saying at all.
Tom ist schlau, nicht wahr?
Tom is smart, isn't he?
Auch wenn du natürlich zu schlau warst, um Spuren zu hinterlassen.
Even though, of course, you were too clever to leave any traces.
— Das Leben der Anderen (2006)
She is very smart.
Du hältst dich für scheiß schlau, was?
You think you're incredibly smart, don't you?
— Mystic River (2003)
Frauen sind so schlau wie Männer.
Women are as smart as men.
Ich will nicht behaupten, ich sei besonders schlau.
I don't want to claim that I'm particularly smart.