cyflymydd

cyflymu (“to accelerate”) +‎ -ydd.

• (North Wales) IPA^(key): /kəvˈləmɨ̞ð/
• (South Wales) IPA^(key): /kəvˈləmɪð/

cyflymydd m (plural cyflymyddion)

1. (vehicles) accelerator, throttle, gas pedal

   Synonym: ysbardun

2. (particle physics) accelerator
3. (chemistry) catalyst

   Synonym: catalydd

• D. G. Lewis, N. Lewis, editors (2005–present), “cyflymydd”, in Gweiadur: the Welsh–English Dictionary, Gwerin
• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “cyflymydd”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies