Gair y Dydd: cefnfor https://geiriadur.ac.uk/gpc/gpc.html?cefnfor – ar Ddiwrnod Cefnforoedd y Byd y Cenhedloedd Unedig. #Cymraeg
Word of the Day: cefnfor 'an ocean': https://geiriadur.ac.uk/gpc/gpc.html?cefnfor – on United Nations World Oceans Day (from cefn (in the sense of 'mid-, middle') + môr 'sea', cf. cefn gweilgi: 'mid-ocean') #Welsh