used in writing to show the sound of a short cough (= the noise made when air is forced from the throat) made by somebody who is trying to get attention or to say something that is difficult or embarrassing （书写用语，表示引起注意或难以启齿时发出的短促咳嗽声）呃哼 More Like This ExclamationsExclamationsWord Originmid 18th cent.: lengthened form of hem, a sound made when coughing or clearing the throat to attract attention or express hesitation.