Some people may be tempted to give untruthful answers.

有些人可能会给出不真实的答案。

That's an untruthful description.

那是一个不真实的记述。

He thinks ideas make people untruthful.

他认为动脑筋会使人们不诚实。

I am disgusted with the untruthful world.

我厌倦了这虚伪的世界。

The whole batch becomes greedy and untruthful.

整批变得贪婪和不诚实。