Language Point 39

And inventive teachers can make their assignments almost cheat-proof. (Para. 14)

Meaning: And teachers who are creative can make their assignments free of cheating by students.

cheat-proof: protected against cheating

能防止骗人的

Please notice the structure "(n.)-proof":

fire-proof 防火的

water-proof 放水的

bullet-proof 防弹的

proof: a. having or giving protection 能防......的

You are wasting your time and energy; I'm temptation-proof.

你是在浪费时间和精力，我是不会受诱惑的。

n. way of showing that something is true 证据

Do you have any proof to show you are very capable?

你有证据证明你有能力吗？