beriberi
be·ri·beri
noun
1.
avitaminosis caused by lack of thiamine (vitamin B1)
Origin
Possibly borrowed from Sinhalese phrase බැරි බැරි (bæri bæri, “I cannot, I cannot”) due to weakness.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.