Welsh

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Etymology

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From ystaen (tin) +‎ gwydr (glass).

Pronunciation

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Noun

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ystaenwydr m (uncountable)

  1. (obsolete) bismuth
    Synonym: bismwth

Further reading

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  • R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “ystaenwydr”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies