When I was a kid, I was wrong about so many things.

I thought craneflies, or daddy longlegs, were the “ most poisonous spider in the world, ” but had no way of administering their toxins (wrong on many counts).

I also thought the longest word in the English language was antidisestablishmentarianism, but it is in fact pneumonoultramicroscopicsilicovolcanoconiosis – a lung disease caused by inhalation of silicate or quartz dust, apparently.

Even as an adult, though, I would never have guessed what some experts deem the “most complex” word a standard dictionary has to offer.

And nor did the members of r/todayilearned , who were as surprised as I was to find out it’s “run”.

Why is “run” considered the most complex word in English?

It’s because the word has so many definitions (

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