In rural south Vietnam especially in the Mekong delta region, there is a word called nhửng, not the ~ tone but rather the 'hoi' tone.
nhửng means: the state of a body of water (such as a river) while at high or low tide. Either when the water body is at high or low tide.
Thanks, by the way I can't add this word because I can't read the number lolz
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Chữ nhửng là một chữ có nghĩa là khi sông đang nước ròng hoặc khi nước cạn.