Merriam-Webster's Collegiate® Dictionary, 11th Edition
MISTAKE
I. verb (mistook; mistaken; mistaking)
Etymology: Middle English
Date: 14th century
transitive verb to blunder in the choice of ,
2. to misunderstand the meaning or intention of ; misinterpret , to make a wrong judgment of the character or ability of, to identify wrongly ; confuse with another , intransitive verb to be wrong , mistakenly adverb mistaker noun
II. noun
Date: 1600
a wrong judgment ; misunderstanding , a wrong action or statement proceeding from faulty judgment, inadequate knowledge, or inattention, see: error