cooldown → χαλάρωση, αποθεραπεία, κουλάρισμα, ξεκούραση
(video games) The minimum length of time that the player needs to wait after using an ability or item before it can be used again.
I had to wait for the cooldown to finish before recasting the spell.
(sports) The rest period between sets or workout sessions.
(by extension) Any rest period between sessions of an activity or event.
cooldown - Wiktionary