The novel was unspeakably boring.

这部小说无聊得无法形容。

《柯林斯英汉双解大词典》

The face was unspeakably sad.

脸上是说不出的悲伤。

youdao

The rice is steamed and is unspeakably delicious.

米饭蒸熟了，好吃得难以形容。

youdao

In his photographs of gas stations, diners and cemeteries he found a beauty so simple but commonplace it was often overlooked, so unspeakably true but poignant it was rarely acknowledged."

VOA: special.2009.03.23

I think it takes your breath away to think of the unspeakably high hopes that John Milton had for his career.

我觉得像弥尔顿这样说出自己对职业如此高的希望,是很让人吃惊的。

耶鲁公开课 - 弥尔顿课程节选

You must agree with me that perhaps he might have some bordello-oriented thoughts, there is no way in hell that this unspeakably self-controlled young man would actually find himself in a whorehouse.

你们必须同意我的看法,虽然弥尔顿有妓院为本的思想，但实在难以形容这位那么自律的年轻人,会去妓院。

耶鲁公开课 - 弥尔顿课程节选

If it's unspeakably priceless and it would kill you if it got broken, don't use it.

NPR: Holiday Manners: Don't Refuse the Cranberry Relish

Lots of parts were unspeakably boring: methodologies of American jurisprudence, examinations of the American system of townships.

NEWYORKER: Great Experiment

But for Ronnie and thousands of other interpreters working with the U.S. military, getting out is unspeakably difficult.

CNN: Iraqi interpreter: 'Now I have no future'