Meaning of “unmistakable” - Learner’s Dictionary

unmistakable

adjective uk us /ˌʌnmɪˈsteɪkəbl/

Something that is unmistakable is very obvious and cannot be confused with anything else:

an unmistakable look of disappointment
unmistakably adverb

(Definition of “unmistakable” from the Cambridge Learner’s Dictionary © Cambridge University Press)