0 present participle of underestimate --
1 to fail to guess or understand the real cost, size, difficulty, etc. of something: --
Originally the contractor gave me a price of €2,000, but now they say they underestimated and it's going to be at least €3,000.
Don't underestimate the difficulties of getting both parties to the conference table.
2 to fail to understand how strong, skilful, intelligent, or determined someone, especially a competitor, is: --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.