IPA: /ˈtʃɜːrnər/
KK: /ˈtʃɜrnər/
A container used for mixing cream to produce butter by agitating it.
The farmer used a churner to make fresh butter from the cream.
Churner → The word is formed from "churn" (from Old English *cyrnan*, meaning to turn or agitate) and the suffix "-er" (meaning a person who). A churner is a person who turns or agitates, specifically in the context of making butter or other dairy products.
Think of someone who 'turns' ('cyrnan') ingredients to make butter — that's what a churner does.