IPA: /ˈʃaʊərhɛd/
KK: /ˈʃaʊərˌhɛd/
A device that sprays water over a person when they take a shower.
I adjusted the showerhead to get a better water flow.
Showerhead → It is formed from "shower" (from Old English *scūr*, meaning a fall of rain or water) and "head" (from Old English *heafod*, meaning the top or source). The word "showerhead" refers to the source or top part of a device that disperses water in a shower.
Think of a 'fall of water' ('shower') coming from the 'top' ('head') of the fixture — that's why a showerhead is where the water comes from.