interj.感嘆詞嗯 (表示思考)"Hmmmm, I'm not sure about that," she said thoughtfully.
interj.感嘆詞嗯 (表示懷疑)He said he finished the project in one day. Hmmmm, I find that hard to believe.
interj.感嘆詞嗯 (表示興趣)"Hmmmm, that's an interesting idea," he mused.
n.名詞嗡嗡聲There was a soft hmmmm coming from the refrigerator.
v.i.不及物動詞哼唱She was hmmmming to herself as she walked down the street.