IPA: /ˈtuːlˌhaʊs/
KK: /ˈtuːlˌhaʊs/
A small building or shed used for keeping tools and equipment.
He went to the toolhouse to get his hammer and nails.
Toolhouse → It is formed from "tool" (from Old English *tōl*, meaning an instrument or implement) and "house" (from Old English *hūs*, meaning a dwelling or shelter). A toolhouse is a shelter or storage place for tools.
Think of a 'shelter' ('house') for 'instruments' ('tool') — that's what a toolhouse is.