cunning; crafty; wily; sly
あの商人は悪賢いことで有名だ。
That merchant is famous for being cunning.
その詐欺師のやり口は実に悪賢かった。
The scammer's methods were truly cunning.
子犬のいたずらは悪賢くないので、すぐに見破れる。
The puppy's mischief isn't crafty, so it's easy to see through.