misunderestimated

Verb

misunderestimate (third-person singular simple present misunderestimates, present participle misunderestimating, simple past and past participle misunderestimated)

1. (nonstandard, malapropism or humorous) To underestimate mistakenly or wrongly; to misestimate with an error on the lower side.
   • . . .is almost sure to misunderstand and misunderestimate the significance of the question at hand.1897 April 17, “American Diplomacy on the Bosphorous”, in The Outlook

   Synonyms:

   underapproximate, underestimate, sell short, underguess, underjudge, underrate, underreckon, understate

   Antonyms:

   overstate, overapproximate, overestimate, overhold, overrate, overreckon, overthink