A void in an object.

It is irrelevant and lacks substance.

Pronunciation of "empty": kōng dòng?

Make sentences:

People have strong speaking ability, but most of them are empty and deceptive.

Honesty is definitely not a kind of sales, let alone a profound and empty concept.

Taking goodness as the foundation and morality as the standard, pleasure is empty and happiness is deep.

The wind blew away. A year passed like this.

There is a big hole under that mountain.

The triple reading chapter of this article is long and empty.

His article is empty and not worth reading. ?