misreckon
Definitions
To calculate or estimate incorrectly.
To misjudge or form a wrong opinion about someone or something.
Examples
The accountant did not want to misreckon the company's quarterly earnings, so he double-checked every entry.
It is easy to misreckon the distance to the horizon when you are unfamiliar with the terrain.
Synonyms
miscalculate misjudge miscount err misinterpret misestimate blunder