twrf

• twrw, twryf
• tŵrf, twrwbh, twrwf, twryv (obsolete)

From Middle Welsh twryf, from Latin turba, from Ancient Greek τύρβη (túrbē). Doublet of torf.

• IPA^(key): /ˈtʊrv/

twrf m (plural tyrfau or twrfau)

1. disturbance, tumult, uproar
2. (South Wales) thunderclap

   Synonyms: taran, trwst

3. (obsolete) mob, crowd, throng, multitude

When referring to thunder, Welsh may employ the singular twrf or plural tyrfau to correspond to English collective noun thunder depending on the context, e.g.

• Glywest ti’r twrf ’na?

  Did you hear that thunder? (i.e. that (single) clap of thunder)

• Glywest ti’r tyrfau ’na?

  Did you hear that thunder? (i.e. those (several) claps of thunder)

• cynnwrf (“commotion”)

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