penthouse

Từ điển Oxford Advanced Learner 8th

pent·house [penthouse penthouses] BrE [ˈpenthaʊs] NAmE [ˈpenthaʊs] noun
an expensive and comfortable flat/apartment or set of rooms at the top of a tall building
•a luxury penthouse suite

Word Origin:
Middle English pentis (originally referring to an outhouse or shelter with sloping roof), shortening of Old French apentis, based on late Latin appendicium ‘appendage’, from Latin appendere ‘hang on’. The change of form in the 16th cent. was by association with French pente ‘slope’ and ↑house.

Example Bank:
•The hotel has 54 fully appointed rooms plus a luxury penthouse suite.