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Related to wear thin: worn thin
1. Of an object, often a fabric, to physically become thinner or cause to become worn, as from frequent use. A noun or pronoun can be used between "wear" and "thin." You can see here how the leather has been worn thin by years of use.
2. To diminish or become less effective. Please try to behave. My patience is beginning to wear thin. It was cute the first few times that he did it, but his little routine has worn thin.
1. Be weakened or diminished gradually, as in My patience is wearing thin. [Late 1800s]
2. Become less convincing, acceptable, or popular, as in His excuses are wearing thin. [First half of 1990s] Both usages transfer the thinning of a physical object, such as cloth, to nonmaterial characteristics.
wear ˈthinbegin to become less; become less interesting or amusing: My patience is beginning to wear very thin. ♢ Don’t you think that joke’s wearing a bit thin? (= we have heard it many times before)
1. To be weakened or eroded gradually: Her patience is wearing thin.
2. To become less convincing, acceptable, or popular, as through repeated use: excuses that are wearing thin.