Sentence:  Thus "hamburger" (whose true etymology is 'city of Hamburg' + "er" 'someone from') has been <WSD>reanalyzed</WSD> as "ham" + "burger" 'burger made with ham.' 
Meaning of the word marked with <WSD> tags:  Analyze a lexeme with a different structure from its original, often by misunderstanding. For example, "hamburger", which is originally "Hamburg" + "-er", was reanalyzed as "ham" + "-burger", which produced words like "cheeseburger".