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worry at sth

(PROBLEM) phrasal verb with worry
 
/ˈwʌr.i/
 
US  /ˈwɝː-/ verb

Definition

to keep trying to find a way of solving a problem: She'll worry at those figures until she's sure they've been worked out properly.Thinking and contemplating
(Definition of worry at sth (PROBLEM) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of worry at sth