schelmisch
From LSJ
Φιλοκαλοῦμέν τε γὰρ μετ' εὐτελείας καὶ φιλοσοφοῦμεν ἄνευ μαλακίας → Our love of what is beautiful does not lead to extravagance; our love of the things of the mind does not makes us soft.
German > Latin
schelmisch, perfĭdus (treulos). – fraudulentus (betrügerisch). – lascīvus (voll mutwilliger Schäkerei).