Using teeth to cut or pierce something, or sharp and hurtful (for words or weather).
From Old English 'bitan,' related to German 'beißen'; the verb is ancient and appears in most Indo-European languages, reflecting how fundamental biting is to human and animal experience.
When we describe harsh words as 'biting' or cold weather as 'biting,' we're using our most primitive survival instinct—our ancestors' brains remembered dangerous teeth and teeth-like threats, so the word became our universal symbol for hurt!
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