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English definition of “turn on sb”

turn on sb

verb uk phrasal verb with turn   /tɜːn/ us    /tɝːn/
to attack or criticize someone suddenly and unexpectedly: Suddenly she just turned on me and accused me of undermining her.
(Definition of turn on sb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of turn on sb?
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