IPA: //spɛkˈteɪtə//
KK: /spɛkˈteɪtər/
A person who watches an event, such as a game or a show, without participating in it.
The spectators cheered loudly as the team scored a goal.
Spectator → It is formed from "spectare" (meaning to look or watch) and "-or" (meaning one who). The word "spectator" refers to one who watches or observes an event.
Think of someone who is 'watching' ('spectare') an event — that's why a spectator is someone who observes.