IPA: /rɪˈliːvər/
KK: /rɪˈliːvər/
A person or thing that helps to reduce pain, stress, or difficulty, or in baseball, a pitcher who replaces another to help the team.
The coach decided to bring in a reliever to finish the game strong.
Reliever → It is formed from "re-" (meaning again) and "levare" (meaning to lift or alleviate). The word "reliever" refers to something that alleviates or lifts a burden again, providing relief.
Think of something that 'lifts' ('levare') a burden 'again' ('re-') — that's why a reliever is something that helps alleviate discomfort.