低聲說出口的不滿
從一次低聲的說話動作,延伸到一群人長期在檯面下的抱怨——同樣是「有意見,但不放到檯面上」。
mutter, speak quietly · verb · B2
To say something in a low, quiet voice, so that it is hard to hear the words — usually because you are annoyed about something, or because you do not want other people to hear you.
咕噥;嘀咕