In a manner that causes horror, shock, or revulsion; extremely badly or unpleasantly.
From Latin 'horribilis' meaning 'causing horror', from 'horrere' (to bristle with fear). The root is related to 'horror' and originally described hair standing on end from fright.
The Latin root 'horrere' literally meant 'to bristle' like an animal's fur standing up in fear. This physical response to danger became the foundation for our entire vocabulary of horror and terrible things.
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