mistake2 past tense mistook past participle mistaken [transitive]
to understand something wrongly:
She mistook my meaning entirely.
Ken mistook her concern, thinking she was interested in him for another reason.
used to say that someone or something is very easy to recognize:
You can't mistake her. She's the one with the long red hair.
used to say that you are certain about something:
There's no mistaking whose children they are - they all look just like Joe.
mistake somebody/something for somebody/somethingphrasal verb
A woman mistook him for a well-known actor, and asked him for his autograph.
The doctor mistook the symptoms for blood poisoning.