IPA: /ˈkuːlˌdaʊn/
KK: /ˈkuːlˌdaʊn/
A time after intense physical activity when a person does lighter exercises or stretches to help their body recover and return to normal.
After the workout, we did a cooldown to help our muscles relax.
Cooldown → It is formed from "cool" (from Old English "ceald", meaning not warm) and "down" (from Old English "dūn", meaning down or lower). The word "cooldown" refers to the process of becoming cooler or lowering in temperature after exertion or activity.
Think of something becoming 'not warm' ('cool') and then 'lowering' ('down') in temperature — that's what cooldown means.
No commonly confused words.