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Synonyms

underestimate

American  
[uhn-der-es-tuh-meyt, uhn-der-es-tuh-mit, -meyt] / ˌʌn dərˈɛs təˌmeɪt, ˌʌn dərˈɛs tə mɪt, -ˌmeɪt /

verb (used with object)

underestimated, underestimating
  1. to estimate at too low a value, rate, or the like.

    Synonyms:
    miscalculate, misjudge, underrate, undervalue

verb (used without object)

underestimated, underestimating
  1. to make an estimate lower than that which would be correct.

noun

  1. an estimate that is too low.

underestimate British  
/ ˌʌndərˈɛstɪˌmeɪt /

verb

  1. to make too low an estimate of

    he underestimated the cost

  2. to think insufficiently highly of

    to underestimate a person

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. too low an estimate

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

Underestimate is sometimes wrongly used where overestimate is meant: the importance of his work cannot be overestimated (not cannot be underestimated )

Other Word Forms

  • underestimation noun

Etymology

Origin of underestimate

First recorded in 1805–15; under- + estimate

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Sports underestimate their human elements, the tics and oddities that make them unique.

From The Wall Street Journal • Mar. 26, 2026

This is a far higher proportion than we would see if Wall Street analysts were equally likely to overestimate earnings as underestimate them.

From Barron's • Mar. 26, 2026

When she leaves - 27 years later - she'll act as a mentor for new MSPs after the election and will tell them not to underestimate what can be achieved.

From BBC • Mar. 22, 2026

“I’ve learned that you don’t ever underestimate or try to make predictions on what Shohei’s going to do,” manager Dave Roberts said.

From Los Angeles Times • Mar. 18, 2026

I’m glad to see it—they are going to underestimate me.

From "Warcross" by Marie Lu