This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. To make too low an estimate of the quantity, degree, or worth of.

n. An estimate that is or proves to be too low.

v. To perceive (someone or something) as having a lower value, quantity, worth etc. than what it actually has.

n. An estimate or perception that is too low.

v. To set too low a value on; to estimate below the truth.

n. The act of underestimating; too low an estimate.

To estimate at too low a rate; not to value sufficiently.

n. An estimate or valuing at too low a rate.

n. an estimation that is too low; an estimate that is less than the true or actual value

v. make a deliberately low estimate

v. assign too low a value to

v. make too low an estimate of

"One point you may underestimate is how deeply liberals believe that rich-getting-richer really is hurting the middle class and how the middle class, too, is deserving of lots of social help — if not total egalitarian-type redistribution."

overestimate   

underestimated    underestimates    underestimating   

idea    estimation    approximation    estimate    judge    guess    gauge    approximate    value   

underrate    misunderestimate    misjudge    underestimation   

estimate    overestimate