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Corrode comes from the Latin verb corrōdere, meaning "to gnaw or chew up." Corrōdere, in turn, combines the prefix cor- (used here as an intensifier with the meaning of "completely") with the verb rōdere ("to gnaw"). (You may recognize another rōdere descendent, rodent, as a word for members of an order of gnaw-happy mammals.) At one time, corrode was used to literally indicate the action of gnawing away, as in "woodworms corroded the wood." But it is the more figurative senses from the action of gnawing or eating away that have persisted, as in "salt water corroded the iron" or "a lack of transparency by local officials is corroding public trust."
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“Corrode.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/corrode. Accessed 8 Jul. 2026.
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