You use utter to emphasize that something is great in extent, degree, or amount.
absolute , total
This, of course, is utter nonsense.
这当然纯属胡言乱语。
this utter lack of responsibility.
完全没有责任心。
utters , uttering , uttered
If someone utters sounds or words, they say them.
He uttered a snorting laugh.
他扑哧一声笑了。