utter [ˈʌtə(r)]

以下由轻松背单词网站提供

vt.发出(声音)，说；adj.完全的，绝对的

to say something or to make a sound with your voice

He smacked his lips but did not utter a word. 他吧嗒两下嘴，但一句话也没说。
I was at an utter loss what to do. 我完全不知道该怎样做才好。