The first time you saw the word biopic, did you pronounce it ‘bi-OPic’, to rhyme with myopic, either aloud or in your head, before learning that it’s ‘bio-pic’, as in biographical picture? If so, you were well and truly mizzled. I mean MY-zelled. No, wait: misled.
There are words we know, or think we know, but: (1) we probably got to know them in print before hearing them spoken, and (2) their spelling is ambiguous or misleading in a way that leads us to ‘hear’ them differently – perhaps incorrectly – in our mind’s ear.
Eventually there’s a lightbulb moment. Oh, it’s a bio-pic, not a bi-opic! I’ve been mis-led, not mizzled! Some linguists and language enthusiasts call these troublesome words misles, back-formed from misled, which is perhaps the prototypical misle. Others call them book words.