Having the power to gradually wear away or destroy by chemical action. Figuratively, gradually harmful or destructive to relationships or morale.
From Latin 'corrosivus', from 'corrodere' meaning 'to gnaw away', composed of 'cor-' (intensive) + 'rodere' (to gnaw). The word entered English in the 14th century, initially describing chemical processes, later extended to social contexts.
Rust, one of the most common forms of corrosion, actually protects some metals - the green patina on the Statue of Liberty is copper corrosion that formed a protective layer preventing further damage. The word's metaphorical use is equally fascinating: describing someone's words as 'corrosive' suggests they don't just hurt in the moment but continue eating away at relationships over time.
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