verb \pər-ˈtərb\

: to cause (someone) to be worried or upset

Full Definition of PERTURB

transitive verb
:  to cause to be worried or upset :  disquiet
:  to throw into confusion :  disorder
:  to cause to experience a perturbation
per·turb·able \-ˈtər-bə-bəl\ adjective

Examples of PERTURB

  1. It perturbed him that his son was thinking about leaving school.
  2. <the caller's strange remark perturbed me enough to keep me awake that night>

Origin of PERTURB

Middle English, from Middle French perturber, from Latin perturbare to throw into confusion, from per- + turbare to disturb — more at turbid
First Known Use: 14th century


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