I used to believe the word "isolated" meant "maybe". This was due to the weather reports on the news saying isolated showers, and my parents saying that meant maybe it would rain and maybe it wouldn't.
A childhood belief about speaking

others believed things like this
- I used to believe I could control the weather by singing rain rain go away or blowing the clouds away.— Shannon
- my husband believed, until recently, that the word "several" meant seven of something. — sheryl
- I used to believe that "nuptial" was a naughty word. I thought it meant nipple. XD— Sara Hagen
- i used to think the word "friendship" meant a special kind of rocketship that you went on with your friends.— chips ahoy!
- I used to think that tampons were meant to absorb women's urine so they wouldn't have to go to the bathroom.— Koyaanisqatsi
- For years I heard the word "pedophile" and thought it meant a pedicurist's tool.— Lauren