1. Rate something lower than its real/actual value , under appreciate.
2.Estimate/ rate someone lower than his/her actual potential, qualifications.
Synonyms for Underestimate
On this page, you will find 30 slang terms related to Underestimated. Some of the top words include: floccinaucinihilipilification, jimmybay, mershy, bjarg, minger, and 25 more.