The building blocks of English
Affixes
-decker
Having a specified number of decks or layers.
English deck plus ‑er1.
Examples are four-decker, of a ship with four decks; three-decker, of a Victorian novel in three volumes; triple-decker, a sandwich containing three slices of bread with fillings between; double-decker, something, especially a bus, that has two floors or levels.
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