IPA: /ˈhɔːlweɪ/
KK: /ˈhɔːlˌweɪ/
A long, narrow space in a building that connects different rooms or areas.
She walked down the hallway to her classroom.
Hallway → The word is formed from "hall" (from Old English *heall*, meaning a large room or building) and "way" (from Old English *weg*, meaning a path or road). A hallway is essentially a path or corridor leading through a large room or building.
Think of a 'large room' ('hall') that has a 'path' ('way') running through it — that's what a hallway is.