pontoon · noun1
- Latin · derived frompontō, pontōnem“ferryboat”
- Old French · derived fromponton
- Middle French · borrowed fromponton
- English todaypontoon
Borrowed from Middle French ponton, from Old French ponton, from Latin pontō, pontōnem (“ferryboat”), from pōns (“bridge”).
pontoon · noun2
Probably from vingt-un, an obsolete variant of vingt-et-un (“twenty-one”), from French.
Etymology from Wiktionary, CC BY-SA 4.0.