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There’s nothing fishy about flounder... the verb, that is. While the noun referring to a common food fish is of Scandinavian origin, the verb flounder, which dates to the late 16th century, is likely an alteration of an older verb, founder. The two verbs have been confused ever since. Today, founder is most often used as a synonym of fail, or, in contexts involving a waterborne vessel, as a word meaning “to fill with water and sink.” Formerly, it was also frequently applied when a horse stumbled badly and was unable to keep walking. It’s likely this sense of founder led to the original and now-obsolete meaning of flounder: “to stumble.” In modern use, flounder typically means “to struggle” or “to act clumsily”; the word lacks the finality of founder, which usually suggests complete collapse or failure, as that of a sinking ship.
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“Flounder.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flounder. Accessed 20 Sep. 2026.
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