undersell

verb

1. To sell goods for a lower price than a competitor.

   “Our price-match guarantee: we will not be undersold!”

2. To sell something for less than its value.
3. To put forward an idea, or to market a new product (or oneself), with insufficient enthusiasm or excessive understatement.

   “Near-synonym: sell short”

   “don't undersell it”

   “don't undersell yourself”

   “But by inferring sleep, the etymology also undersells Siberia's scope, both real and imagined.”