A person who travels or journeys, especially one who pays a fare to travel by public transportation.
From Old English 'faran' meaning to go or travel, combined with the agent suffix '-er'. Historically referred to any traveler, but evolved to specifically mean a paying passenger on a vehicle.
The word 'farer' contains the root of 'farewell'—when you say goodbye to someone traveling, you're literally wishing them good 'fare' (journey), showing how medieval language built whole concepts from journey metaphors.
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