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English definition of “unnerve”

unnerve

verb [T]     /ʌnˈnɜːv/ US  /-ˈnɝːv/
to make someone feel less confident and slightly frightened : I think it unnerved me to be interviewed by so many people .Causing anxiety and worryMaking people sad, shocked and upset unnerving     /-ˈnɜː.vɪŋ/ US  /-ˈnɝː.vɪŋ/ adjective Meeting a twin brother I didn't know I had was an unnerving experience .Causing anxiety and worryMaking people sad, shocked and upset unnervingly     /ʌnˈnɜː.vɪŋ.li/ US  /-ˈnɝː-/ adverb Causing anxiety and worryMaking people sad, shocked and upset
(Definition of unnerve verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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