Meaning : Assign too low a value to.
Example :
Don't underestimate the value of this heirloom-you may sell it at a good price.
Synonyms : undervalue
Assign too high a value to.
You are overestimating the value of your old car.Meaning : Make a deliberately low estimate.
Example :
The construction company wanted the contract badly and lowballed.
Synonyms : lowball
Meaning : Make too low an estimate of.
Example :
He underestimated the work that went into the renovation.
Don't underestimate the danger of such a raft trip on this river.
Synonyms : underrate
Meaning : An estimation that is too low. An estimate that is less than the true or actual value.
Synonyms : underestimation, underrating, underreckoning