perturb


per·turb

verb \pər-ˈtərb\

: to cause (someone) to be worried or upset

Full Definition of PERTURB

transitive verb
1
:  to cause to be worried or upset :  disquiet
2
:  to throw into confusion :  disorder
3
:  to cause to experience a perturbation
per·turb·able \-ˈtər-bə-bəl\ adjective

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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