cunning: [13] Cunning did not always have its present-day negative connotations. At first it was a term of approval, meaning ‘learned’. It is connected in some way to the verb can, which originally meant ‘know’, although it is not altogether clear whether it is a direct use of the present participle of the English verb, or whether it was borrowed from the related Old Norse kunnandi, present participle of kunna ‘know’. Either way, it is a parallel formation to canny [16]. The sense ‘skilfully deceitful’ developed towards the end of the 16th century. => canny
cunning (adj.)
early 14c., "learned, skillful," present participle of cunnen "to know" (see can (v.1)). Sense of "skillfully deceitful" is probably late 14c. As a noun from c. 1300. Related: Cunningly.
实用例句
1. His cunning and guile were not attributes I would ever underestimate.