misgrade

verb

mis·​grade ˌmis-ˈgrād 

misgraded; misgrading

transitive verb

: to grade (something) wrongly

The following Monday the office was flooded with complaints from soldiers convinced that their exams had been misgraded by the Army computer.

—Bryan Bender and Kevin Baron

… a Brentwood home that was damaged in a mudslide caused when city employees misgraded a fire road.

—Christina Binkley

In all, he said, the company has identified seven projects for which it supplied lumber that was misgraded.

—Tim Healy

Word History

First Known Use

1866, in the meaning defined above