Gair y Dydd: syrfeio https://geiriadur.ac.uk/gpc/gpc.html?syrfeio – ddechrau Gorffennaf 1737 y cychwynnodd Lewis Morris, un o Forrisiaid Môn, ar ei waith mawr yn syrfeio a mapio arfordir Cymru. #Cymraeg
Word of the Day: syrfeio 'to survey (land)': https://geiriadur.ac.uk/gpc/gpc.html?syrfeio – at the beginning of July 1737 Lewis Morris, one of the Morris brothers of Môn, began his great work surveying and mapping the coast of Wales. #Welsh