underrate or look down on
an estimate about the size, cost, etc. of sth that is too low
"Don't underestimate the value of this heirloom-you may sell it at a good price"
"The construction company wanted the contract badly and lowballed"
"he underestimated the work that went into the renovation"
"Don't underestimate the danger of such a raft trip on this river"
It would be wrong to underestimate the bonds between Eliot and Vivien.
出自： P. Ackroyd