To sell at a lower price than someone else

To undervalue or underestimate something

किसी चीज़ को कम आंकना

English Usage: He tends to undersell his own abilities during job interviews.

Hindi Usage: वह नौकरी के साक्षात्कार के दौरान अपनी क्षमताओं को कम आंकने की प्रवृत्ति रखता है।