IPA: /ˈslɔːtəhaʊs/
KK: /ˈslɔːtərˌhaʊs/
A facility where animals are killed and processed for meat.
The farmer took his cattle to the slaughterhouse for processing.
Slaughterhouse → It is formed from "slaughter" (from Old English *sleaht*, meaning the act of killing) and "house" (from Old English *hus*, meaning a building or shelter). A slaughterhouse is a building where the act of killing animals for food takes place.
Think of a place where the act of killing ('slaughter') happens inside a building ('house') — that's what a slaughterhouse is.