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English definition of “fluster”

fluster

verb [T]  /ˈflʌs·tər/ us  
to make someone nervous or upset, esp. when the person is trying to do something: Don’t let that new tax form fluster you – it’s not as bad as it looks.
flustered
adjective  /ˈflʌs·tərd/ us  
If I look flustered it’s because I’m trying to do 20 things at once.
(Definition of fluster from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of fluster?
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