underattribute

verb4

1. •
   To attribute insufficiently or inadequately.
2. •
   To underestimate the role of some specified factors in causing (a particular outcome, action, or state of affairs).

   • Our tendency to overattribute behavior to dispositions and underattribute it to circumstances is known as the fundamental attribution error (Ross, 1977). — 2000
3. •
   To tend to mistakenly believe that (a certain quality) is not present when, in fact, it is.
4. •
   To misattribute a work of art by asserting that the artist is a less renowned one than it actually is.

   • In the event of a sleeper consignment, the auctioneer is often not fraudulently misrepresenting the property, as he generally has no intention to erroneously underattribute and undersell the lot. — 2016