3 sentences

1. 无论敌人如何狡猾，其阴谋绝不会得逞。

   wú​lùn dí​rén rú​hé jiǎo​huá, qí yīn​móu jué bù huì de chěng.

   No matter how cunning the enemy is, their plot will never succeed.

   Source: Dong Chinese Dictionary

2. 他是一个狡猾的对手，千万不能掉以轻心。

   tā shì yī gè jiǎo​huá de duì​shǒu, qiān​wàn bù néng diào​yǐ​qīng​xīn.

   He is a cunning opponent; we must not let our guard down.

   Source: Dong Chinese Dictionary

3. 别看他表面诚实，其实是个狡猾的老狐狸。

   bié kàn tā biǎo​miàn chéng​shí, qí​shí shì gè jiǎo​huá de lǎo hú​li.

   Don't let his honest appearance fool you; he's actually a cunning old fox.

   Source: Dong Chinese Dictionary