IPA: //ˈheɪˌfiːld//
KK: /ˈheɪˌfiːld/
A piece of land where grass is grown and cut for hay.
The farmer walked through the hayfield to check the quality of the grass.
Hayfield → It is formed from "hay" (from Old English *heg*, meaning grass that has been cut and dried) and "field" (from Old English *feld*, meaning an open land or area). A hayfield is an area of land where grass is grown specifically for making hay.
Think of a field where grass is cut and dried to make hay — that's what a hayfield is.