truth的形容词是truthful。truth作为名词，基本含义为“真相”、“实情”、“真实性”、“真理”；truthful作为truth的形容词形式，基本含义为“诚实的”、“真实的”、“如实的”、“讲真话”、“坦率”。

truth作为名词，意为真相;实情;事实;真实情况;真实;真实性;真理。

例句：Do you think she's telling the truth ?

你认为她在讲实话吗？

The truth (of the matter) is we can't afford to keep all the staff on.

实际情况是我们无力继续聘用所有的职员。

I don't think you are telling me the whole truth about what happened.

我认为你没有把事情的全部真相都告诉我。

There is no truth in the rumours.

这些谣言毫无根据。

There is not a grain of truth in what she says.

她说的没有一句真话。

She was forced to face up to a few unwelcome truths about her family.

她不得不正视有关她家的几桩尴尬事。

Is it possible to separate truth from fiction?…

有可能把事实与虚构分开吗？

There is no truth in this story...

这个故事纯属虚构。

In truth, we were both unhappy.

事实上，我们俩都不快乐。

To tell you the truth, I was afraid to see him...

坦白说，我害怕见他。

truthful作为形容词，意为诚实的;真实的;诚实;如实的;讲真话;坦率。

例句：She could not give him a truthful answer.

她不能给他一个诚实的答案。

They were less than truthful about their part in the crime.

他们对自己在这次犯罪中所起的作用讲的绝非实情。

We've all learnt to be fairly truthful about our personal lives

我们都学会了要非常坦诚地对待自己的个人生活。

Most religions teach you to be truthful and self-disciplined.

多数宗教教导人们要真诚和律己。

She expected to have some plain and truthful answers.

她期待能得到一些坦率而真实的回答。

Autobiography is often less truthful than biography.

自传往往不如传记来得真实。

I don't think you are being entirely truthful.

我认为你并没全讲真话。

The new stories they offer are usually truthful and accurate.

他们提供的消息真实而准确。