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English definition of “underestimate”

underestimate

verb [T]  /ˌʌn·dəˈres·təˌmeɪt/ us  
to think that something is less or lower than it really is, or that someone is less strong or less effective: Homeowners often underestimate the cost of repairing a roof.
(Definition of underestimate from the Cambridge Academic Content Dictionary © Cambridge University Press)
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