mistaking

(noun) putting the wrong interpretation on. Synonyms: misinterpretation, misunderstanding. Examples: "His misinterpretation of the question caused his error." "There was no mistaking her meaning."

(verb) identify incorrectly. Synonyms: mistake, misidentify. Example: "Don't mistake her for her twin sister."

(verb) to make a mistake or be incorrect. Synonyms: err, mistake, slip.