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Beriberi is an illness you get when your body does not get enough vitamin B1 for a long time. It mainly hurts the nerves, so a person can feel very weak, and the hands or feet may tingle or not work well. It can also make the body swell and make the heart struggle. You used to see it where people ate almost only white rice with the outer part taken off, because that outer part held the vitamin. It is a real doctors’ word, not an old folk name for tiredness. With mixed food it is uncommon, though it can still appear if someone eats far too narrowly.
腳氣病（醫療用語。台灣日常說「腳氣」，多半是指香港腳，不是這個病。）
組成The word is the same piece said twice. It was possibly borrowed from Sinhalese, where bæri bæri means “I cannot, I cannot,” because the sick person was so weak.
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
beriberinoun
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medicinepathologysciencesAn ailment caused by a deficiency of thiamine (vitamin B1), leading to lethargy and organ complications.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。