frostbite

The word frostbite is a transparent English compound formed from two native Germanic roots. The first element, "frost," descends from the Proto-Germanic frustaz, meaning "frost," which itself is derived from the Proto-Indo-European root preus-, meaning "to freeze" or "to burn." The second element, "bite," originates from the Proto-Germanic bītaną, "to bite," from the PIE root bʰeyd-, meaning "to split" or "to cleave." The compound's logic is vividly metaphorical: it conceptualizes the injurious effect of severe cold as if the frost itself were a creature or force that "bites" into the flesh, causing damage. This imagery effectively bridges the literal sense of a physical bite with the abstract medical condition caused by freezing, a semantic evolution that occurred within the history of the English language.

Structure: frost (frozen dew) + bite (act of biting) - frost: From Old English forst, frost, of Germanic origin; related to Dutch vorst and German Frost. It functions as the core noun indicating the condition of freezing cold. - bite: From Old English bītan, of Germanic origin. In this compound, it functions metaphorically as a noun meaning "a sharp, piercing effect," describing the action of the cold.