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English definition of “knackering”

knackering

adjective uk   /ˈnæk.ər.ɪŋ/ us    /-ɚ-/ UK slang
making you feel very tired: What a knackering day it's been!Complicated and difficult to doDifficult to understand
(Definition of knackering from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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