Antonym: overestimate. Similar words: overestimate, estimate, estimated, ultimate, intimate, inestimable, intimately, legitimate. Meaning: [‚ʌndə(r)'estɪmeɪt] 
n. an estimation that is too low; an estimate that is less than the true or actual value. v. 1. assign too low a value to 2. make a deliberately low estimate 3. make too low an estimate of.
n. an estimation that is too low; an estimate that is less than the true or actual value. v. 1. assign too low a value to 2. make a deliberately low estimate 3. make too low an estimate of. 
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31. Never underestimate the simplicity of this approach.
32. It was always a mistake to underestimate Spittals.
33. This was an underestimate of course.
34. Never underestimate the power of the trade press.
35. Never underestimate the power of self-motivation.
36. I think people do underestimate what is sexually attractive.
37. This is an underestimate and masks great regional differences.
38. Don't underestimate the power of suggestion.
39. We do not want to underestimate difficulties and problems.
40. You should never underestimate their impact.
41. These figures may underestimate the problem.
42. Some people underestimate the problems that can arise from poor human relations.
43. Yet even this number, one in twenty[Sentence dictionary], is probably an underestimate.
44. It is important not to underestimate these indirect effects of religion on science.
45. Most people neglect or underestimate the values of smiling, and some people view smiling as a sign of weakness or self-depreciating - to their own disadvantage. Dr T.P.Chia 
46. Although psychology recognizes the resultant uncertainties in computer-dependent methods, it tends to underestimate them.
47. There could be 50 people at the wedding, but this is probably an underestimate.
48. It is reasonable to assume that all such figures underestimate the real activities of the elderly.
49. First, does it underestimate the power of sinfulness in us all?
50. We should not underestimate the effect of our own disappointment.
51. Research shows that people consistently overestimate the time they spend working and underestimate their leisure time.
52. And whatever else she did, she must never underestimate him again.
53. Nor should we underestimate the health problems of later life.
54. The later figures may therefore underestimate the extent to which wealth is concentrated.
55. At the very most, the moral is: Never underestimate the mystery and power of love.
56. To explain something is not to explain it away and to understand something is not to underestimate its value.
57. Never underestimate your problem or your ability to deal with it. Robert H. Schuller
58. This is not to underestimate the Club's previous social calendar which for many years included successful dinner dances and club socials.
59. To say this is not in the least to underestimate the crucial and indispensable importance of such therapy in itself.
60. No one can underestimate the difficulties implicit in achieving a negotiated settlement.
More similar words: overestimate, estimate, estimated, ultimate, intimate, inestimable, intimately, legitimate, ultimately, penultimate, plundered, illegitimate, legitimately, interesting, interestingly, compound interest, undergraduate, understatement, nominal interest rate, underground, ultimatum, intimation, antimatter, under, climate, animate, under way, thunder, blunder, plunder.