An intense, irrational fear of flying or air travel that causes significant anxiety or distress.
From Greek 'aero-' (air) + 'phobos' (fear). This compound was created in the late 19th/early 20th century when aviation became a real possibility, combining ancient Greek roots to describe a modern psychological condition.
Aerophobia became a documented psychological term right around the time planes were invented—humans created a whole new category of fear the moment we figured out how to fly! It's fascinating that we needed new vocabulary for anxieties that didn't exist a century earlier.
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