Disgruntled passengers grumbled among themselves.
Meaning: The people waiting for the train were unhappy and complaining quietly to each other.
Choice of Words: Disgruntled means feeling unhappy or dissatisfied. Passengers are people traveling on a train, bus, or other public transport. Grumbled means to complain or express dissatisfaction in a low, muttering voice. Among means in or into the midst of a group of people or things.
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