pontoon
noun
- flotation device; airtight hollow structures that is buoyant in water
Wiktionary
Pronunciation: /pɒnˈtuːn/
noun
Etymology: Probably from vingt-un, an obsolete variant of vingt-et-un (“twenty-one”), from French.
- A card game in which the object is to obtain cards whose value adds up to, or nearly to, 21 but not exceed it.