IPA: /ˈʃaʊərər/
KK: /ˈʃaʊərər/
A person who takes a shower, typically for washing or refreshing themselves.
After a long day at work, the showerer felt relaxed and clean after their shower.
Showerer → It is formed from "shower" (from Old English *scūr*, meaning a fall of rain or water) and "-er" (meaning a person who). A showerer is a person who showers or uses a shower.
Think of someone who is using a 'fall of water' ('shower') — the '-er' just means a person. A showerer is someone who showers.