Definition of worst verb from the Oxford Advanced Learner's Dictionary

 

worst

 verb
verb
BrE BrE//wɜːst//
 
; NAmE NAmE//wɜːrst//
 
Verb Forms present simple I / you / we / they worst
BrE BrE//wɜːst//
 
; NAmE NAmE//wɜːrst//
 
he / she / it worsts
BrE BrE//wɜːsts//
 
; NAmE NAmE//wɜːrsts//
 
past simple worsted
BrE BrE//ˈwɜːstɪd//
 
; NAmE NAmE//ˈwɜːrstɪd//
 
past participle worsted
BrE BrE//ˈwɜːstɪd//
 
; NAmE NAmE//ˈwɜːrstɪd//
 
-ing form worsting
BrE BrE//ˈwɜːstɪŋ//
 
; NAmE NAmE//ˈwɜːrstɪŋ//
 
 
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worst somebody (old-fashioned or formal) [usually passive] to defeat somebody in a fight, a contest or an argument synonym get the better of Word Origin Old English wierresta, wyrresta (adjective), wierst, wyrst (adverb), of Germanic origin; related to worse.
See the Oxford Advanced American Dictionary entry: worst