chwarenglwyf

chwarren (“gland”) +‎ clwyf (“sickness”).

• (North Wales) IPA^(key): /ˌχwarɛŋˈɡluːɨ̯v/
• (South Wales) IPA^(key): /ˌχwarɛŋˈɡlʊi̯v/

chwarenglwyf f (uncountable, not mutable)

1. glandular fever, mononucleosis

   Synonym: twymyn y chwarennau

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