What does tarnishing mean?
Tarnishing is the process of becoming dull, discolored, or covered with a thin layer of corrosion, most commonly used of metals such as silver, copper, and brass. It can also describe the gradual loss of brightness or appeal caused by handling, exposure, or chemical reaction. The word appears frequently in practical contexts, such as protecting silver from tarnishing or identifying why a metal surface has darkened. Figuratively, to tarnish something is to damage its reputation, value, or public image, as when misconduct tarnishes an organization’s achievements. Although tarnishing is technically a process, it is widely understood as a vivid metaphor for the fading of beauty, excellence, or trust. The word is useful because it captures both a visible physical change and the symbolic erosion of something once valued.
To become dull, discolored, or covered with a thin corrosion layer, especially as a metal tarnishes; figuratively, to damage the reputation or perceived value of something.
"The brass fixtures began to tarnish in the damp weather."
The verb can be transitive, as in “to tarnish a reputation,” or intransitive, as in “the silver is tarnishing.”
The process of metal discoloration or corrosion; figuratively, the damage or dimming of a reputation, image, or value.
"Regular polishing can slow the tarnishing of antique silver."
The noun use is especially natural with phrases such as “the tarnishing of silver” and “prevent tarnishing.”
Silver tarnishes when sulfur compounds in the air form a thin, dark layer on its surface, turning brightness into a muted sheen.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does tarnishing come from?
The word enters English through Middle English, deriving from Old French ternir, meaning to dull or darken. The modern form tarnish developed in English, and tarnishing is its present-participle and verbal-noun form. The family also includes related forms such as tarnisher and tarnishable.
Related word forms
How tarnishing is actually used
Tarnishing is common in both technical descriptions of metal corrosion and figurative descriptions of reputational damage. The figurative use is generally somewhat formal and carries a negative connotation.
Easily confused with tarnishing
Tarnishing names a process, while tarnished is the adjective or past participle describing something that has undergone that process.