To understand wrongly, taking one thing or person for another.
Don't mistake my kindness for weakness.
To misunderstand (someone).
To commit an unintentional error; to do or think something wrong.
To take or choose wrongly.
Erroneous.
A mistaken sense of loyalty.
(with a copula verb, often with about) Having an incorrect belief.
He admitted he was mistaken about the budget numbers.