Ex-pense, traul, cost; treuliad
Ex-pert, hyfedrydd; cyfarwydd, cywraint
Ex-pire, anadlu allan; trengu, marw
Ex-plain, egluro, amlygu; dangos
Ex-plode, ffrwydro; difrio; cablu
Ex-ploit, gorchest, camp; gwrolwaith
Ex-plore, fforio; chwilio; profi
Ex-port, allforiad, trawglud
Ex-pose, eglurhâd: dynoethi; dangos
Ex-pound, egluro, esbonio; dirnad