ずる賢い

sly, cunning, crafty

ずる sneaky, unfair + 賢 smart, intelligent, wise + い adjective-forming; having the quality of
adjective · present tense Rare #44,047
sly, cunning, crafty Usually negative: clever in a dishonest or sneaky way.
JA: あのキツネはずる賢い。
EN: That fox is sly.

キツネは他の動物よりずる賢いと言われています。

Foxes are said to be more cunning than other animals.

彼はとてもずる賢いので私は嫌いだ。

I dislike him because he’s so sly.

トムは賢いというよりずる賢いイメージだな。

I see Tom as more cunning than smart.

ドイツ人はとてもずる賢い。

Germans are very sly.