IPA: /ˈnʌkəlˌbɔːl/
KK: /ˈnʌkəlˌbɔl/
A type of baseball pitch that is thrown with little spin, causing it to move unpredictably as it approaches the batter.
The pitcher surprised everyone with a perfect knuckleball that danced through the air.
Knuckleball → The word is formed from "knuckle" (from Old English *cnucol*, meaning a joint of the finger) and "ball" (from Old French *bal*, meaning a spherical object). A knuckleball is a type of pitch in baseball that is thrown with a grip on the knuckles, causing it to have an unpredictable trajectory.
Think of the 'knuckle' as the joint of your finger that grips the ball, which makes the pitch unpredictable — that's why a knuckleball behaves so erratically.
No commonly confused words.