misdeem
To misjudge, to deem wrongly.
The doubt which ye misdeem, fair love, is vain, / That fondly fear to lose your liberty; / […]
Where it comes from
Late 14th century, from Middle English misdemen, equivalent to mis- + deem. Cognate with Icelandic misdæma (“to misjudge”).
Adapted from the Wiktionary entry misdeem (CC BY-SA 4.0).