Mar-in-er, morwr, llongwr
Mar-tyr-dom, merthyrdod
Mar-vel-ous, rhyfeddol, aruthrol
Mas-cu-line, gwryw; dynol
Mas-sa-cre, galanasdra: cigyddio
Mas-ter-ly, trachywrain; meistrawl
Mas-ti-cate, dygnoi, cnoi
Ma-ter-nal, mamaidd, mamawl
Mat-ri-cide, mamladdiad
Me-an-der, dolystumio; dolenu