IPA: /ˈmɪlˌstrim/
KK: /ˈmɪlˌstrim/
A stream of water that is used to power a mill, often flowing quickly.
The old mill was powered by a millstream that ran through the valley.
Millstream → It is formed from "mill" (from Old English *mylen*, meaning a place for grinding grain) and "stream" (from Old English *stream*, meaning a flow of water). The word "millstream" refers to a stream of water that powers a mill, typically used for grinding grain.
Think of a 'place for grinding grain' ('mill') that is powered by a 'flow of water' ('stream'). This helps you remember that a millstream is a stream that drives a mill.