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wor·ry·ing | \ ˈwər-ē-iŋ 
, ˈwə-rē- \
, ˈwə-rē- \Definition of worrying
: causing worry : creating reason for worry : troubling a worrying trend/development a worrying question The presence of the knife on the stage of the murder was a worrying circumstance for Wilson.— Mark Twain
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Time Traveler for worrying
The first known use of worrying was in 1817
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