Detailed Meaning:
Verb: To buy a whole lot. e.g. "to sell in bulk". Liyu Zhengshi (里语徵实-卷上-一字徵实) quotes Life Essentials: "Unload and throw when it's expensive, and pontoon when it's cheap".
Adverb: to buy in bulk.
Adverb: to sell wholesale, to buy wholesale.
Quantifier: Qing Dynasty - Liang Ting-Zhan - The Story of the Barbarians, Volume 1: "Every one thousand six hundred and eighty-eight pounds is a pontoon.
Kangxi Dictionary: Dongbenche (东本切), dun Shangsheng (敦上声). The word "pontoon" is a common word. The word "pontoon" is also a common character.
Introduction: yóng dǎnt (拥趸) is a Cantonese dialect word used in Hong Kong as a translation of the English word Fanatics (abbreviated as "Fans" or "Fan"), which can be regarded as a dialect of the Hong Kong region, and is most commonly used in Hong Kong, but was rarely used in the Mainland and Taiwan, where Modern Standard Chinese is the lingua franca. The term "water" has become a common vocabulary after being reproduced by the media in Hong Kong.
Water pontoon: dragonfly larvae in the initial stage is called (dragonfly) larvae, and then in the feathering to the adult stage before the stage called an insect (read chai), note that the following is a "worm" word.