IPA: /rɪˈzɜːrvə/
KK: /rɪˈzɜrvər/
A person who makes a reservation for something, such as a seat, room, or service.
The reserver called ahead to ensure their table was ready.
Reserver → It is formed from "re-" (meaning again) and "server" (from Latin "servare", meaning to keep or save). The word "reserver" means to keep something for future use or to save it for someone.
Think of 'keeping something again' — 're-' means again, and 'servare' means to keep. This helps you remember that to reserve means to keep something for later.