Question

make a sentence of as cunning as a fox.

Answer 1

my enemy is cunning as a fox

Answer 2

As cunning as fox is a simile used to denote the slyness of a person. It is usually taken in a negative manner.

For example, the thief was as cunning as a fox.  Even as a child, Moriarty was as cunning as a fox. She thought she was as cunning as a fox but she still could not win.