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1.
A problem that makes a flawless plan or machine go wrong, as though one were throwing a wrench inbetween a perfectly set pair of gears.
We had the perfect plan for today, but when the homeless man slashed my van's tires, he threw a wrench in the system.
de C. Suba 11 septembre 2006

Words related to A wrench in the system

dilemma error mess problem screwed