twll du

Welsh

Etymology

Calque of English black hole

Noun

twll du m (plural tyllau duon)

1. black hole (celestial body)

Mutation

Mutated forms of twll du

radical	soft	nasal	aspirate
twll du	dwll du	nhwll du	thwll du

Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.

Further reading

• 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