1. 低估；轻视；小看
If you undervalue something or someone, you fail to recognize how valuable or important they are.

1. lose in value

e.g. The dollar depreciated again

Synonym: depreciatedevaluatedevalue

2. esteem lightly

3. assign too low a value to

e.g. Don't underestimate the value of this heirloom-you may sell it at a good price

Synonym: underestimate