IPA: /ˈwɔːr.mʌp/
KK: /ˈwɔrmˌʌp/
A period of gentle exercise or activity that prepares the body for more intense physical activity.
Before the game, the players did a warmup to get ready.
Warmup → It is formed from "warm" (from Old English *wearm*, meaning having a higher temperature) and "up" (meaning to a higher position or state). The word "warmup" refers to the act of increasing temperature or readiness, especially in preparation for physical activity.
Think of making something 'warmer' ('warm') and getting it 'ready' ('up') — that's why warmup means to prepare by increasing warmth or readiness.