twll du
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Welsh[edit]
Etymology[edit]
Noun[edit]
twll du m (plural tyllau duon)
- black hole (celestial body)
Mutation[edit]
| Welsh mutation | |||
|---|---|---|---|
| radical | soft | nasal | aspirate |
| twll du | dwll du | nhwll du | thwll du |
| Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs. | |||
Further reading[edit]
- R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “twll du”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies