When I was younger I heard the word manure used (my mother and most nearby relatives had gardens), but had never seen it written. When I finally saw it I failed to connect the spoken word with what I was reading, so I gave it my own pronunciation: man'yer. It took a while to dicsover the mistake.
A childhood belief about speaking

others believed things like this
- In first grade, I thought that if I've never heard of a word before, then it wasn't a word.— Destiny
- As a small child I believed that the word was "nakeup", finally I found out that it was actually "makeup".— Hannnah P.
- I used to think the word fever was just another word for giraff— Marshall m
- When I was young, I heard the word 'minion' for the first time and thought it was a miniature onion.— Karin
- For years I heard the word "pedophile" and thought it meant a pedicurist's tool.— Lauren
- When I was younger I thought I had made up the word "nipples" and "thinga-majigger" — Amelia