Very hard to believe, often because something is extremely good, large, or surprising.
From Latin 'incredibilis' meaning 'unbelievable', from 'in-' (not) and 'credibilis' (believable), from 'credere' (to believe). It originally suggested doubt rather than praise.
Incredible used to mean ‘I don’t buy it’; now we often use it to mean ‘so good it’s almost unbelievable’. The word still carries that edge of disbelief, which is why it adds drama to compliments.
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