Be weakened or diminished gradually, as in My patience is wearing thin. [Late 1800s]
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.
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How to use wear thin in a sentence
And the Daya/Bennett storyline is really starting to wear thin as well.Inside ‘Orange Is the New Black’ S2, Eps. 6-12: About That Shocking Incest Scene|Kevin Fallon, Marlow Stern|June 20, 2014|DAILY BEAST
But as the months of new parenthood wore on, my patience began to wear thin.Confessions of an Obama Campaign Widow|Laura Moser|August 22, 2012|DAILY BEAST
The self-deceptions of wealth, power, and prominence wear thin.The Outline of History: Being a Plain History of Life and Mankind|Herbert George Wells
Only you must believe, because I tell it you, that your mother's love will never grow old or wear thin.The History of Sir Richard Calmady|Lucas Malet
It began to wear off and wear thin, first in one place and then in another, the rising sun helping to melt it.The Curlytops and Their Playmates|Howard R. Garis
The best material for tea and glass-cloths, is a sheet which has begun to wear thin.
One flannel petticoat will wear nearly as long as two, if turned behind-part before, when the front begins to wear thin.