IPA: /ɪkˈskleɪmər/
KK: /ɪkˈskleɪmər/
A person who expresses strong emotion or excitement through exclamations.
The exclaimer shouted with joy when they won the game.
Exclaimer → It is formed from "exclaim" (from Latin "exclamare", meaning to cry out) and "-er" (meaning a person who). An exclaimer is a person who cries out or expresses something loudly or emphatically.
Think of someone who 'cries out' ('exclaim') — the '-er' just means a person. An exclaimer is someone who expresses something loudly.